diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index c73337931b..4922ce5e27 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -823,7 +823,7 @@ static void write_pack_file(void)
 				utb.modtime = --last_mtime;
 				if (utime(pack_tmp_name, &utb) < 0)
 					warning("failed utime() on %s: %s",
-						tmpname, strerror(errno));
+						pack_tmp_name, strerror(errno));
 			}
 
 			/* Enough space for "-<sha-1>.pack"? */