diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 9522669000a7..df7603c30686 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3133,14 +3133,13 @@ out:
 static noinline long btrfs_ioctl_wait_sync(struct btrfs_fs_info *fs_info,
 					   void __user *argp)
 {
-	u64 transid;
+	/* By default wait for the current transaction. */
+	u64 transid = 0;
 
-	if (argp) {
+	if (argp)
 		if (copy_from_user(&transid, argp, sizeof(transid)))
 			return -EFAULT;
-	} else {
-		transid = 0;  /* current trans */
-	}
+
 	return btrfs_wait_for_commit(fs_info, transid);
 }