diff --git a/dist/index.js b/dist/index.js
index 5b666854..0d05e633 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -198,8 +198,8 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 
 var escodegen = __webpack_require__(25);
 var esprima = __webpack_require__(48);
-var estraverse = __webpack_require__(16);
-var NodeType_1 = __webpack_require__(15);
+var estraverse = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 var Node_1 = __webpack_require__(12);
 
 var NodeUtils = function () {
@@ -530,7 +530,7 @@ var _createClass3 = _interopRequireDefault(_createClass2);
 
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
-var NodeType_1 = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 
 var Node = function () {
     function Node() {
@@ -895,6 +895,12 @@ exports.AbstractCustomNode = AbstractCustomNode;
 
 /***/ },
 /* 15 */
+/***/ function(module, exports) {
+
+module.exports = require("estraverse");
+
+/***/ },
+/* 16 */
 /***/ function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -936,12 +942,6 @@ exports.NodeType = Utils_1.Utils.strEnumify({
     WhileStatement: 'WhileStatement'
 });
 
-/***/ },
-/* 16 */
-/***/ function(module, exports) {
-
-module.exports = require("estraverse");
-
 /***/ },
 /* 17 */
 /***/ function(module, exports, __webpack_require__) {
@@ -1382,7 +1382,7 @@ var _createClass3 = _interopRequireDefault(_createClass2);
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
 var escodegen = __webpack_require__(25);
-var NodeType_1 = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 
 var Nodes = function () {
     function Nodes() {
@@ -2176,9 +2176,9 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
 var ServiceIdentifiers_1 = __webpack_require__(4);
-var estraverse = __webpack_require__(16);
+var estraverse = __webpack_require__(15);
 var NodeTransformers_1 = __webpack_require__(40);
-var NodeType_1 = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 var ObfuscationEvents_1 = __webpack_require__(22);
 var VisitorDirection_1 = __webpack_require__(81);
 var Node_1 = __webpack_require__(12);
@@ -4490,9 +4490,9 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
 var ServiceIdentifiers_1 = __webpack_require__(4);
-var estraverse = __webpack_require__(16);
+var estraverse = __webpack_require__(15);
 var CustomNodes_1 = __webpack_require__(20);
-var NodeType_1 = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 var AbstractNodeTransformer_1 = __webpack_require__(17);
 var Node_1 = __webpack_require__(12);
 var NodeAppender_1 = __webpack_require__(24);
@@ -4740,9 +4740,9 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
 var ServiceIdentifiers_1 = __webpack_require__(4);
-var estraverse = __webpack_require__(16);
+var estraverse = __webpack_require__(15);
 var NodeObfuscatorsReplacers_1 = __webpack_require__(19);
-var NodeType_1 = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 var AbstractNodeTransformer_1 = __webpack_require__(17);
 var Node_1 = __webpack_require__(12);
 var NodeUtils_1 = __webpack_require__(8);
@@ -4836,9 +4836,9 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
 var ServiceIdentifiers_1 = __webpack_require__(4);
-var estraverse = __webpack_require__(16);
+var estraverse = __webpack_require__(15);
 var NodeObfuscatorsReplacers_1 = __webpack_require__(19);
-var NodeType_1 = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 var AbstractNodeTransformer_1 = __webpack_require__(17);
 var Node_1 = __webpack_require__(12);
 var NodeUtils_1 = __webpack_require__(8);
@@ -4966,9 +4966,9 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
 var ServiceIdentifiers_1 = __webpack_require__(4);
-var estraverse = __webpack_require__(16);
+var estraverse = __webpack_require__(15);
 var NodeObfuscatorsReplacers_1 = __webpack_require__(19);
-var NodeType_1 = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 var AbstractNodeTransformer_1 = __webpack_require__(17);
 var Node_1 = __webpack_require__(12);
 var NodeUtils_1 = __webpack_require__(8);
@@ -5064,9 +5064,9 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
 var ServiceIdentifiers_1 = __webpack_require__(4);
-var estraverse = __webpack_require__(16);
+var estraverse = __webpack_require__(15);
 var NodeObfuscatorsReplacers_1 = __webpack_require__(19);
-var NodeType_1 = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 var AbstractNodeTransformer_1 = __webpack_require__(17);
 var Node_1 = __webpack_require__(12);
 var NodeUtils_1 = __webpack_require__(8);
@@ -5238,7 +5238,7 @@ var inversify_1 = __webpack_require__(2);
 var ServiceIdentifiers_1 = __webpack_require__(4);
 var escodegen = __webpack_require__(25);
 var NodeObfuscatorsReplacers_1 = __webpack_require__(19);
-var NodeType_1 = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 var AbstractNodeTransformer_1 = __webpack_require__(17);
 var Node_1 = __webpack_require__(12);
 var MemberExpressionObfuscator = function (_AbstractNodeTransfor) {
@@ -5400,7 +5400,7 @@ var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
 var ServiceIdentifiers_1 = __webpack_require__(4);
 var escodegen = __webpack_require__(25);
-var NodeType_1 = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 var AbstractNodeTransformer_1 = __webpack_require__(17);
 var Node_1 = __webpack_require__(12);
 var Utils_1 = __webpack_require__(13);
@@ -5498,9 +5498,9 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
 var ServiceIdentifiers_1 = __webpack_require__(4);
-var estraverse = __webpack_require__(16);
+var estraverse = __webpack_require__(15);
 var NodeObfuscatorsReplacers_1 = __webpack_require__(19);
-var NodeType_1 = __webpack_require__(15);
+var NodeType_1 = __webpack_require__(16);
 var AbstractNodeTransformer_1 = __webpack_require__(17);
 var Node_1 = __webpack_require__(12);
 var NodeUtils_1 = __webpack_require__(8);
@@ -6289,7 +6289,7 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
 var ServiceIdentifiers_1 = __webpack_require__(4);
-var estraverse = __webpack_require__(16);
+var estraverse = __webpack_require__(15);
 var CalleeDataExtractors_1 = __webpack_require__(37);
 var Node_1 = __webpack_require__(12);
 var NodeUtils_1 = __webpack_require__(8);
@@ -6407,7 +6407,7 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 
 var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
-var estraverse = __webpack_require__(16);
+var estraverse = __webpack_require__(15);
 var AbstractCalleeDataExtractor_1 = __webpack_require__(32);
 var Node_1 = __webpack_require__(12);
 var NodeUtils_1 = __webpack_require__(8);
@@ -6485,7 +6485,7 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 
 var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
-var estraverse = __webpack_require__(16);
+var estraverse = __webpack_require__(15);
 var AbstractCalleeDataExtractor_1 = __webpack_require__(32);
 var Node_1 = __webpack_require__(12);
 var NodeUtils_1 = __webpack_require__(8);
@@ -6570,7 +6570,7 @@ function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { de
 
 var tslib_1 = __webpack_require__(3);
 var inversify_1 = __webpack_require__(2);
-var estraverse = __webpack_require__(16);
+var estraverse = __webpack_require__(15);
 var Node_1 = __webpack_require__(12);
 var NodeUtils_1 = __webpack_require__(8);
 var AbstractCalleeDataExtractor_1 = __webpack_require__(32);
diff --git a/test/fixtures/node-transformers/node-control-flow-transformers/function-control-flow-transformer-root-block-scope-1.js b/test/fixtures/node-transformers/node-control-flow-transformers/function-control-flow-transformer-root-block-scope-1.js
new file mode 100644
index 00000000..c3825387
--- /dev/null
+++ b/test/fixtures/node-transformers/node-control-flow-transformers/function-control-flow-transformer-root-block-scope-1.js
@@ -0,0 +1 @@
+var test = 1 + 2;
diff --git a/test/fixtures/node-transformers/node-control-flow-transformers/function-control-flow-transformer-root-block-scope-2.js b/test/fixtures/node-transformers/node-control-flow-transformers/function-control-flow-transformer-root-block-scope-2.js
new file mode 100644
index 00000000..0916c2b8
--- /dev/null
+++ b/test/fixtures/node-transformers/node-control-flow-transformers/function-control-flow-transformer-root-block-scope-2.js
@@ -0,0 +1,11 @@
+(function () {
+    function foo () {
+        function bar () {
+            function baz () {
+                function bash () {
+                    var variable = 1 + 2;
+                }
+            }
+        }
+    }
+})();
diff --git a/test/functional-tests/node-transformers/node-control-flow-transformers/FunctionControlFlowTransformer.spec.ts b/test/functional-tests/node-transformers/node-control-flow-transformers/FunctionControlFlowTransformer.spec.ts
index c5785fc1..69aab3e0 100644
--- a/test/functional-tests/node-transformers/node-control-flow-transformers/FunctionControlFlowTransformer.spec.ts
+++ b/test/functional-tests/node-transformers/node-control-flow-transformers/FunctionControlFlowTransformer.spec.ts
@@ -46,7 +46,7 @@ describe('FunctionControlFlowTransformer', () => {
         });
 
         describe('variant #2 - two `control flow storage` nodes: root and inner', () => {
-            const samplesCount: number = 150;
+            const samplesCount: number = 200;
             const delta: number = 0.1;
             const expectedValue: number = 0.5;
             const regExp1: RegExp = new RegExp(
@@ -114,5 +114,60 @@ describe('FunctionControlFlowTransformer', () => {
                 assert.match(obfuscatedCode, regexp);
             });
         });
+
+        describe('variant #4 - no `control flow storage` node to the root block scope', () => {
+            const obfuscationResult: IObfuscationResult = JavaScriptObfuscator.obfuscate(
+                readFileAsString(
+                    './test/fixtures/node-transformers/node-control-flow-transformers/function-control-flow-transformer-root-block-scope-1.js'
+                ),
+                {
+                    ...NO_CUSTOM_NODES_PRESET,
+                    controlFlowFlattening: true,
+                    controlFlowFlatteningThreshold: 1
+                }
+            );
+            const obfuscatedCode: string = obfuscationResult.getObfuscatedCode();
+
+            it('should\'t add control flow storage node when transformed node in the root block scope', () => {
+                assert.match(obfuscatedCode, /^var *test *= *0x1 *\+ *0x2;$/);
+            });
+        });
+
+        describe('variant #5 - no `control flow storage` node in the root block scope', () => {
+            const samplesCount: number = 20;
+            const expectedValue: number = 0;
+            const regExp: RegExp = new RegExp(
+                `var *[a-zA-Z]{6} *= *\\{` +
+                    `'(\\\\x[a-f0-9]*){3}' *: *function *_0x[0-9] *\\(${variableMatch}, *${variableMatch}\\) *\\{` +
+                        `return *${variableMatch} *\\+ *${variableMatch};` +
+                    `\\}` +
+                `\\};`
+            );
+
+
+            it('should\'t add control flow storage node to the root block scope when transformed nodes not in the root block scope', () => {
+                let totalValue: number = 0;
+
+                for (let i = 0; i < samplesCount; i++) {
+                    const obfuscationResult: IObfuscationResult = JavaScriptObfuscator.obfuscate(
+                        readFileAsString(
+                            './test/fixtures/node-transformers/node-control-flow-transformers/function-control-flow-transformer-root-block-scope-2.js'
+                        ),
+                        {
+                            ...NO_CUSTOM_NODES_PRESET,
+                            controlFlowFlattening: true,
+                            controlFlowFlatteningThreshold: 1
+                        }
+                    );
+                    const obfuscatedCode: string = obfuscationResult.getObfuscatedCode();
+
+                    if (regExp.test(obfuscatedCode)) {
+                        totalValue++;
+                    }
+                }
+
+                assert.equal(totalValue, expectedValue);
+            });
+        });
     });
 });