diff --git a/pkg/kamailio/obs/kamailio.spec b/pkg/kamailio/obs/kamailio.spec
index ae7832c4c88..7e5301b2d32 100644
--- a/pkg/kamailio/obs/kamailio.spec
+++ b/pkg/kamailio/obs/kamailio.spec
@@ -179,6 +179,11 @@
 %bcond_without xmlrpc
 %endif
 
+# Defining missing macros on RHEL/CentOS 6
+%if 0%{?rhel} == 6
+%define _rundir %{_localstatedir}/run
+%endif
+
 # redefine buggy openSUSE Leap _sharedstatedir macro. More info at https://bugzilla.redhat.com/show_bug.cgi?id=183370
 %if 0%{?suse_version} == 1315
 %define _sharedstatedir /var/lib