diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index bb253a78c..890f9e905 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -8206,7 +8206,13 @@ dump_node(mrb_state *mrb, node *tree, int offset)
       while (pairs) {
         dump_prefix(offset+1, lineno);
         printf("key:\n");
-        dump_node(mrb, pairs->car->car, offset+2);
+        if (node_to_sym(pairs->car->car) == MRB_OPSYM(pow)) {
+          dump_prefix(offset+2, lineno);
+          printf("**\n");
+        }
+        else {
+          dump_node(mrb, pairs->car->car, offset+2);
+        }
         dump_prefix(offset+1, lineno);
         printf("value:\n");
         dump_node(mrb, pairs->car->cdr, offset+2);
diff --git a/mrbgems/mruby-compiler/core/y.tab.c b/mrbgems/mruby-compiler/core/y.tab.c
index 7941cde0b..4c3c86a11 100644
--- a/mrbgems/mruby-compiler/core/y.tab.c
+++ b/mrbgems/mruby-compiler/core/y.tab.c
@@ -15035,7 +15035,13 @@ dump_node(mrb_state *mrb, node *tree, int offset)
       while (pairs) {
         dump_prefix(offset+1, lineno);
         printf("key:\n");
-        dump_node(mrb, pairs->car->car, offset+2);
+        if (node_to_sym(pairs->car->car) == MRB_OPSYM(pow)) {
+          dump_prefix(offset+2, lineno);
+          printf("**:\n");
+        }
+        else {
+          dump_node(mrb, pairs->car->car, offset+2);
+        }
         dump_prefix(offset+1, lineno);
         printf("value:\n");
         dump_node(mrb, pairs->car->cdr, offset+2);