diff --git a/src/libecmaobjects/ecma-gc.c b/src/libecmaobjects/ecma-gc.c
index 4ced0032a..b93d47431 100644
--- a/src/libecmaobjects/ecma-gc.c
+++ b/src/libecmaobjects/ecma-gc.c
@@ -97,47 +97,6 @@ ecma_GCInit( void)
     ecma_GC_Queue = NULL;
 } /* ecma_GCInit */
 
-/**
- * Garbage collect described value
- */
-static void
-ecma_GCValue( ecma_Value_t valueDescription) /**< value description */
-{
-    switch ( (ecma_Type_t) valueDescription.m_ValueType )
-    {
-        case ECMA_TYPE_SIMPLE:
-          {
-            /* doesn't hold additional memory */
-            break;
-          }
-
-        case ECMA_TYPE_NUMBER:
-        {
-            ecma_Number_t *pNumber = ecma_GetPointer( valueDescription.m_Value);
-            ecma_FreeNumber( pNumber);
-            break;
-        }
-
-        case ECMA_TYPE_STRING:
-        {
-            ecma_ArrayFirstChunk_t *pString = ecma_GetPointer( valueDescription.m_Value);
-            ecma_FreeArray( pString);
-            break;
-        }
-
-        case ECMA_TYPE_OBJECT:
-        {
-            ecma_DerefObject( ecma_GetPointer( valueDescription.m_Value));
-            break;
-        }
-
-        case ECMA_TYPE__COUNT:
-        {
-            JERRY_UNREACHABLE();
-        }
-    }
-} /* ecma_GCValue */
-
 /**
  * Garbage collect a named data property
  */
@@ -147,7 +106,7 @@ ecma_GCNamedDataProperty( ecma_Property_t *pProperty) /**< the property */
     JERRY_ASSERT( pProperty->m_Type == ECMA_PROPERTY_NAMEDDATA );
 
     ecma_FreeArray( ecma_GetPointer( pProperty->u.m_NamedDataProperty.m_pName));
-    ecma_GCValue( pProperty->u.m_NamedDataProperty.m_Value);
+    ecma_FreeValue( pProperty->u.m_NamedDataProperty.m_Value);
 } /* ecma_GCNamedDataProperty */
 
 /**
diff --git a/src/libecmaobjects/ecma-helpers-value.c b/src/libecmaobjects/ecma-helpers-value.c
index 1c562e40f..17a64a18b 100644
--- a/src/libecmaobjects/ecma-helpers-value.c
+++ b/src/libecmaobjects/ecma-helpers-value.c
@@ -20,6 +20,8 @@
  * @{
  */
 
+#include "ecma-alloc.h"
+#include "ecma-gc.h"
 #include "ecma-globals.h"
 #include "ecma-helpers.h"
 #include "globals.h"
@@ -103,6 +105,115 @@ ecma_MakeObjectValue( ecma_Object_t* object_p) /**< object to reference in value
   return object_value;
 } /* ecma_MakeObjectValue */
 
+/**
+ * Copy ecma-value.
+ *
+ * Note:
+ *  Operation algorithm.
+ *   switch (valuetype)
+ *    case simple:
+ *      simply return the value as it was passed;
+ *    case number/string:
+ *      copy the number/string
+ *      and return new ecma-value
+ *      pointing to copy of the number/string;
+ *    case object;
+ *      increase reference counter of the object
+ *      and return the value as it was passed.
+ *
+ * @return See note.
+ */
+ecma_Value_t
+ecma_CopyValue( const ecma_Value_t value) /**< ecma-value */
+{
+  ecma_Value_t value_copy;
+
+  switch ( (ecma_Type_t)value.m_ValueType )
+  {
+    case ECMA_TYPE_SIMPLE:
+      {
+        value_copy = value;
+      }
+    case ECMA_TYPE_NUMBER:
+      {
+        ecma_Number_t *num_p = ecma_GetPointer( value.m_Value);
+        JERRY_ASSERT( num_p != NULL );
+
+        ecma_Number_t *number_copy_p = ecma_AllocNumber();
+        *number_copy_p = *num_p;
+
+        value_copy = (ecma_Value_t) { .m_ValueType = ECMA_TYPE_NUMBER };
+        ecma_SetPointer( value_copy.m_Value, number_copy_p);
+      }
+    case ECMA_TYPE_STRING:
+      {
+        ecma_ArrayFirstChunk_t *string_p = ecma_GetPointer( value.m_Value);
+        JERRY_ASSERT( string_p != NULL );
+
+        ecma_ArrayFirstChunk_t *string_copy_p = ecma_DuplicateEcmaString( string_p);
+
+        value_copy = (ecma_Value_t) { .m_ValueType = ECMA_TYPE_STRING };
+        ecma_SetPointer( value_copy.m_Value, string_copy_p);
+      }
+    case ECMA_TYPE_OBJECT:
+      {
+        ecma_Object_t *obj_p = ecma_GetPointer( value.m_Value);
+        JERRY_ASSERT( obj_p != NULL );
+
+        ecma_RefObject( obj_p);
+
+        value_copy = value;
+      }
+    case ECMA_TYPE__COUNT:
+      {
+        JERRY_UNREACHABLE();
+      }
+  }
+
+  return value_copy;
+} /* ecma_CopyValue */
+
+/**
+ * Free memory used for the value
+ */
+void
+ecma_FreeValue( ecma_Value_t value) /**< value description */
+{
+  switch ( (ecma_Type_t) value.m_ValueType )
+  {
+    case ECMA_TYPE_SIMPLE:
+      {
+        /* doesn't hold additional memory */
+        break;
+      }
+
+    case ECMA_TYPE_NUMBER:
+      {
+        ecma_Number_t *pNumber = ecma_GetPointer( value.m_Value);
+        ecma_FreeNumber( pNumber);
+        break;
+      }
+
+    case ECMA_TYPE_STRING:
+      {
+        ecma_ArrayFirstChunk_t *pString = ecma_GetPointer( value.m_Value);
+        ecma_FreeArray( pString);
+        break;
+      }
+
+    case ECMA_TYPE_OBJECT:
+      {
+        ecma_DerefObject( ecma_GetPointer( value.m_Value));
+        break;
+      }
+
+    case ECMA_TYPE__COUNT:
+      {
+        JERRY_UNREACHABLE();
+      }
+  }
+} /* ecma_FreeValue */
+
 /**
  * Completion value constructor
  */
diff --git a/src/libecmaobjects/ecma-helpers.h b/src/libecmaobjects/ecma-helpers.h
index e0dd15d56..f2111c20d 100644
--- a/src/libecmaobjects/ecma-helpers.h
+++ b/src/libecmaobjects/ecma-helpers.h
@@ -49,6 +49,9 @@ extern bool ecma_IsValueTrue( ecma_Value_t value);
 
 extern ecma_Value_t ecma_MakeSimpleValue( ecma_SimpleValue_t value);
 extern ecma_Value_t ecma_MakeObjectValue( ecma_Object_t* object_p);
+extern ecma_Value_t ecma_CopyValue( const ecma_Value_t value);
+extern void ecma_FreeValue( const ecma_Value_t value);
+
 extern ecma_CompletionValue_t ecma_MakeCompletionValue( ecma_CompletionType_t type, ecma_Value_t value, uint8_t target);
 extern ecma_CompletionValue_t ecma_MakeThrowValue( ecma_Object_t *exception_p);