diff --git a/Zend/zend_alloc.c b/Zend/zend_alloc.c
index 8164c3ec9aa..d9602c3f696 100644
--- a/Zend/zend_alloc.c
+++ b/Zend/zend_alloc.c
@@ -611,7 +611,7 @@ ZEND_API int _persist_alloc(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
 	/* add the block to the persistent list */
 	ADD_POINTER_TO_LIST(p);
 	HANDLE_UNBLOCK_INTERRUPTIONS();
-	return p->size;
+	return p->size+sizeof(zend_mem_header)+PLATFORM_PADDING;
 }