diff --git a/src/librc/librc.c b/src/librc/librc.c
index 8fad0fa7..8841394a 100644
--- a/src/librc/librc.c
+++ b/src/librc/librc.c
@@ -979,6 +979,7 @@ rc_services_in_runlevel_stacked(const char *runlevel)
 		TAILQ_CONCAT(list, sl, entries);
 		free(sl);
 	}
+	rc_stringlist_free(stacks);
 	return list;
 }