diff --git a/pkg/kamailio/deb/squeeze/control b/pkg/kamailio/deb/squeeze/control
index 0def8c77a..b4c4fc4ac 100644
--- a/pkg/kamailio/deb/squeeze/control
+++ b/pkg/kamailio/deb/squeeze/control
@@ -43,6 +43,9 @@ Package: kamailio
 Architecture: any
 Depends: adduser, ${misc:Depends}, ${shlibs:Depends}
 Conflicts: kamailio-regex-modules
+Conflicts: kamailio-regex-modules,
+           ngcp-system-tools-ce (<< 0.6.0),
+           ngcp-system-tools-pro (<< 0.6.0)
 Suggests: kamailio-berkeley-modules,
           kamailio-carrierroute-modules,
           kamailio-cpl-modules,