diff --git a/jerry-core/mem/mem-allocator.h b/jerry-core/mem/mem-allocator.h
index e591d98d3..4acc16072 100644
--- a/jerry-core/mem/mem-allocator.h
+++ b/jerry-core/mem/mem-allocator.h
@@ -36,7 +36,7 @@ typedef uint16_t mem_cpointer_t;
 /**
  * Representation of NULL value for compressed pointers
  */
-#define MEM_CP_NULL 0
+#define MEM_CP_NULL ((mem_cpointer_t) 0)
 
 /**
  * Required alignment for allocated units/blocks