diff --git a/LICENSE b/LICENSE
index bd3608451..b444cdec5 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright 2014 Samsung Electronics Co., Ltd.
+Copyright 2014-2015 Samsung Electronics Co., Ltd.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
diff --git a/src/liballocator/mem-allocator.c b/src/liballocator/mem-allocator.c
index 576508b2b..1c670423c 100644
--- a/src/liballocator/mem-allocator.c
+++ b/src/liballocator/mem-allocator.c
@@ -1,4 +1,4 @@
-/* Copyright 2014 Samsung Electronics Co., Ltd.
+/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -166,9 +166,10 @@ void
 mem_run_try_to_give_memory_back_callbacks (mem_try_give_memory_back_severity_t severity) /**< severity of
                                                                                               the request */
 {
-  JERRY_ASSERT (mem_try_give_memory_back_callback != NULL);
-
-  mem_try_give_memory_back_callback (severity);
+  if (mem_try_give_memory_back_callback != NULL)
+  {
+    mem_try_give_memory_back_callback (severity);
+  }
 } /* mem_run_try_to_give_memory_back_callbacks */
 
 #ifndef JERRY_NDEBUG