diff --git a/libbcachefs.c b/libbcachefs.c
index df665147..f669088f 100644
--- a/libbcachefs.c
+++ b/libbcachefs.c
@@ -954,6 +954,7 @@ int bchu_data(struct bchfs_handle fs, struct bch_ioctl_data cmd)
 			       e.p.pos.offset);
 		}
 
+		fflush(stdout);
 		sleep(1);
 	}
 	printf("\nDone\n");