diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index f62eca8..4815be2 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2698,7 +2698,8 @@
 		 * We may need to convert up to one extent per block in
 		 * the page and we may dirty the inode.
 		 */
-		rsv_blocks = 1 + (PAGE_SIZE >> inode->i_blkbits);
+		rsv_blocks = 1 + ext4_chunk_trans_blocks(inode,
+						PAGE_SIZE >> inode->i_blkbits);
 	}
 
 	/*