diff --git a/golang-github-prometheus-prometheus.changes b/golang-github-prometheus-prometheus.changes
index 6be87ac..36400ae 100644
--- a/golang-github-prometheus-prometheus.changes
+++ b/golang-github-prometheus-prometheus.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Mar 14 07:20:23 UTC 2018 - jan.fajerski@suse.com
+
+- spec: fix directory for fdupes 
+
 -------------------------------------------------------------------
 Thu Jan 25 10:11:26 UTC 2018 - kkaempf@suse.com
 
diff --git a/golang-github-prometheus-prometheus.spec b/golang-github-prometheus-prometheus.spec
index a5fb620..a8acc77 100644
--- a/golang-github-prometheus-prometheus.spec
+++ b/golang-github-prometheus-prometheus.spec
@@ -86,7 +86,7 @@ install -D -m 0644 %{SOURCE2} %{buildroot}%{_sysconfdir}/prometheus/prometheus.y
 install -Dd -m 0750 %{buildroot}%{_localstatedir}/lib/prometheus
 install -Dd -m 0750 %{buildroot}%{_localstatedir}/lib/prometheus/metrics
 %gofilelist
-%fdupes %{buildroot}
+%fdupes %{buildroot}/%{_prefix}
 
 %pre
 %service_add_pre prometheus.service