diff --git a/script/coredump.spec b/script/coredump.spec
index 69e5d66..80696bb 100644
--- a/script/coredump.spec
+++ b/script/coredump.spec
@@ -1,3 +1,5 @@
+%{!?_topdir: %define _topdir %(pwd)}
+
 Name: coredump-tools
 Version: %{_version}
 Release: %{_release}