diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 79437c5eeb1efcfd0ca484799d0f79fa525709d9..abcb91867b561acbfcb79af76e34f8f13f36abc9 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1197,6 +1197,7 @@ static int btrfs_file_mmap(struct file	*filp, struct vm_area_struct *vma)
 const struct file_operations btrfs_file_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= do_sync_read,
+	.write		= do_sync_write,
 	.aio_read       = generic_file_aio_read,
 	.splice_read	= generic_file_splice_read,
 	.aio_write	= btrfs_file_aio_write,