diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 117c4bb78b35..e1d14936a60d 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -200,6 +200,7 @@ struct map *map__new(struct machine *machine, u64 start, u64 len,
 				dso__set_build_id(dso, dso__bid(header_bid_dso));
 				dso__set_header_build_id(dso, 1);
 			}
+			dso__put(header_bid_dso);
 		}
 		dso__put(dso);
 	}