diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index f9da7364321e..901ad7f6f4dc 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1221,6 +1221,7 @@ int map_groups__merge_in(struct map_groups *kmaps, struct map *new_map)
 
 				m->end = old_map->start;
 				list_add_tail(&m->node, &merged);
+				new_map->pgoff += old_map->end - new_map->start;
 				new_map->start = old_map->end;
 			}
 		} else {
@@ -1241,6 +1242,7 @@ int map_groups__merge_in(struct map_groups *kmaps, struct map *new_map)
 				 *      |new......| ->         |new...|
 				 * |old....|        -> |old....|
 				 */
+				new_map->pgoff += old_map->end - new_map->start;
 				new_map->start = old_map->end;
 			}
 		}