diff --git a/releng.control/commonVariations.shsource b/releng.control/commonVariations.shsource
index f860371a145ce36592a0a6986b9396a27a020946..eac2a3d308ba14b93704528ad76e44527b095b67 100644
--- a/releng.control/commonVariations.shsource
+++ b/releng.control/commonVariations.shsource
@@ -137,7 +137,7 @@ export DASHBOARDHOST=206.191.52.34
 
 # comment out WTP_XULRUNNER if no special version is required
 # rarely needed. machine specific
-export WTP_XULRUNNER=/shared/common/mozilla-xulrunner181-1.8.1.4-30.ppc
+#export WTP_XULRUNNER=/shared/common/mozilla-xulrunner181-1.8.1.4-30.ppc
 echo "WTP_XULRUNNER: " $WTP_XULRUNNER
 
 export DASHBOARD_CONFIG=${RELENG_CONTROL}/dashboard-config.xml
\ No newline at end of file