diff --git a/merge-recursive.c b/merge-recursive.c
index ae6ade4..d6f238d 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -230,7 +230,7 @@
 		for (i = 0; i < active_nr; i++) {
 			struct cache_entry *ce = active_cache[i];
 			if (ce_stage(ce))
-				fprintf(stderr, "BUG: %d %.*s", ce_stage(ce),
+				fprintf(stderr, "BUG: %d %.*s\n", ce_stage(ce),
 					(int)ce_namelen(ce), ce->name);
 		}
 		die("Bug in merge-recursive.c");