diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-function.cpp b/jerry-core/ecma/builtin-objects/ecma-builtin-function.cpp
index 8a8df5005..fdc093de5 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-function.cpp
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-function.cpp
@@ -131,6 +131,10 @@ ecma_builtin_function_helper_get_arguments (const ecma_value_t *arguments_list_p
   {
     ret_value = ecma_make_normal_completion_value (ecma_make_string_value (arguments_str_p));
   }
+  else
+  {
+    ecma_deref_ecma_string (arguments_str_p);
+  }
 
   return ret_value;
 } /* ecma_builtin_function_helper_get_arguments */
diff --git a/tests/jerry/function-construct.js b/tests/jerry/function-construct.js
index fed3df1b9..66a1e7da9 100644
--- a/tests/jerry/function-construct.js
+++ b/tests/jerry/function-construct.js
@@ -98,6 +98,20 @@ catch (e)
   assert (e instanceof TypeError);
 }
 
+var p = { toString : function() { throw 1; } };
+var body = { toString : function() { throw "body"; } };
+
+try
+{
+  new Function (p, body);
+  // Should not be reached.
+  assert (false);
+}
+catch (e)
+{
+  assert (e === 1);
+}
+
 // Check SyntaxError handling
 try
 {