diff --git a/ext/opcache/ZendAccelerator.c b/ext/opcache/ZendAccelerator.c
index 7aaaa6d0302..fb3a725b855 100644
--- a/ext/opcache/ZendAccelerator.c
+++ b/ext/opcache/ZendAccelerator.c
@@ -4307,7 +4307,7 @@ static void preload_load(void)
 		CG(map_ptr_last) = ZCSG(map_ptr_last);
 		CG(map_ptr_size) = ZEND_MM_ALIGNED_SIZE_EX(CG(map_ptr_last) + 1, 4096);
 		ZEND_MAP_PTR_SET_REAL_BASE(CG(map_ptr_base), perealloc(ZEND_MAP_PTR_REAL_BASE(CG(map_ptr_base)), CG(map_ptr_size) * sizeof(void*), 1));
-		memset(ZEND_MAP_PTR_REAL_BASE(CG(map_ptr_base)) + old_map_ptr_last, 0,
+		memset((void **) ZEND_MAP_PTR_REAL_BASE(CG(map_ptr_base)) + old_map_ptr_last, 0,
 			(CG(map_ptr_last) - old_map_ptr_last) * sizeof(void *));
 	}
 }