diff --git a/CHANGELOG.md b/CHANGELOG.md
index da014156..40da7c83 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## CHANGELOG
 
+### v0.32.14
+
+* Fix: Keep env order for extended makefiles #523
+
 ### v0.32.13 (2021-03-05)
 
 * Enhancement: Support rust-script as an additional rust runner #516
diff --git a/examples/extending-env.toml b/examples/extending-env.toml
new file mode 100755
index 00000000..7582327e
--- /dev/null
+++ b/examples/extending-env.toml
@@ -0,0 +1,5 @@
+
+extend = "env.toml"
+
+[env]
+SIMPLE = "EXTENDED VALUE"
diff --git a/src/lib/descriptor/mod.rs b/src/lib/descriptor/mod.rs
index cc6a99da..f962ab1d 100755
--- a/src/lib/descriptor/mod.rs
+++ b/src/lib/descriptor/mod.rs
@@ -48,30 +48,31 @@ fn merge_env(
         if !key_str.starts_with("CARGO_MAKE_CURRENT_TASK_") {
             let value_clone = value.clone();
 
-            if merged.contains_key(&key_str) {
-                let base_value = merged.swap_remove(&key_str).unwrap();
+            match merged.get(&key_str) {
+                Some(base_value) => {
+                    let base_value_clone = base_value.clone();
+                    match (base_value_clone, value_clone.clone()) {
+                        (
+                            EnvValue::Profile(ref base_profile_env),
+                            EnvValue::Profile(ref extended_profile_env),
+                        ) => {
+                            let mut base_profile_env_mut = base_profile_env.clone();
+                            let mut extended_profile_env_mut = extended_profile_env.clone();
 
-                match (base_value, value_clone.clone()) {
-                    (
-                        EnvValue::Profile(ref base_profile_env),
-                        EnvValue::Profile(ref extended_profile_env),
-                    ) => {
-                        let mut base_profile_env_mut = base_profile_env.clone();
-                        let mut extended_profile_env_mut = extended_profile_env.clone();
+                            let merged_sub_env =
+                                merge_env(&mut base_profile_env_mut, &mut extended_profile_env_mut);
 
-                        let merged_sub_env =
-                            merge_env(&mut base_profile_env_mut, &mut extended_profile_env_mut);
-
-                        merged.insert(key_str, EnvValue::Profile(merged_sub_env));
-                    }
-                    _ => {
-                        merged.insert(key_str, value_clone);
-                        ()
-                    }
-                };
-            } else {
-                merged.insert(key_str, value_clone);
-            }
+                            merged.insert(key_str, EnvValue::Profile(merged_sub_env));
+                        }
+                        _ => {
+                            merged.insert(key_str, value_clone);
+                        }
+                    };
+                }
+                None => {
+                    merged.insert(key_str, value_clone);
+                }
+            };
         }
     }
 
diff --git a/src/lib/descriptor/mod_test.rs b/src/lib/descriptor/mod_test.rs
index 55dc6b9d..e62d79fc 100755
--- a/src/lib/descriptor/mod_test.rs
+++ b/src/lib/descriptor/mod_test.rs
@@ -404,6 +404,21 @@ fn load_descriptors_no_load_workspace_makefile() {
     assert!(task.is_none());
 }
 
+#[test]
+#[ignore]
+fn load_env_extended_override() {
+    let toml_file = "./src/lib/test/makefiles/env-extended.toml";
+
+    envmnt::remove_all(&vec!["IF_UNDEFINED", "COMPOSITE_OF_MAPPED"]);
+    let config = load(toml_file, true, None, false).unwrap();
+    environment::set_env_for_config(config.env, None, false);
+
+    assert!(envmnt::is_equal("IF_UNDEFINED", "EXTENDED"));
+    assert!(envmnt::is_equal("COMPOSITE_OF_MAPPED", "VALUE: EXTENDED"));
+
+    envmnt::remove_all(&vec!["IF_UNDEFINED", "COMPOSITE_OF_MAPPED"]);
+}
+
 #[test]
 #[ignore]
 fn load_env_override() {
diff --git a/src/lib/test/makefiles/env-extended.toml b/src/lib/test/makefiles/env-extended.toml
new file mode 100755
index 00000000..e4b3422a
--- /dev/null
+++ b/src/lib/test/makefiles/env-extended.toml
@@ -0,0 +1,5 @@
+
+extend = "./env.toml"
+
+[env]
+IF_UNDEFINED = "EXTENDED"