.diff

 ext/mysqlnd/mysqlnd_block_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/mysqlnd/mysqlnd_block_alloc.c b/ext/mysqlnd/mysqlnd_block_alloc.c
index e1d3f846ec..10f6bd3b6d 100644
--- a/ext/mysqlnd/mysqlnd_block_alloc.c
+++ b/ext/mysqlnd/mysqlnd_block_alloc.c
@@ -161,7 +161,7 @@ mysqlnd_mempool_create(size_t arena_size)
 	MYSQLND_MEMORY_POOL * ret;
 
 	DBG_ENTER("mysqlnd_mempool_create");
-	arena = mysqlnd_arena_create(MAX(arena_size, sizeof(zend_arena)));
+	arena = mysqlnd_arena_create(MAX(arena_size, ZEND_MM_ALIGNED_SIZE(sizeof(zend_arena))));
 	ret = mysqlnd_arena_alloc(&arena, sizeof(MYSQLND_MEMORY_POOL));
 	ret->arena = arena;
 	ret->last = NULL;