diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 740ae8c71701077de03396fc0c0bae377100ad4c..35bf83876f3fe51eae6f4769a89246981f10d1c9 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1244,7 +1244,7 @@ static noinline int prepare_pages(struct inode *inode, struct page **pages,
 	int i;
 	unsigned long index = pos >> PAGE_CACHE_SHIFT;
 	gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping);
-	int err;
+	int err = 0;
 	int faili;
 
 	for (i = 0; i < num_pages; i++) {