diff --git a/releng.control/cc.sh b/releng.control/cc.sh
index 9e841094923e14f0c67405893a81a8f5fb806856..cd3026117a06e50d0686c9419c7959cce8c9c8a9 100644
--- a/releng.control/cc.sh
+++ b/releng.control/cc.sh
@@ -59,6 +59,6 @@ echo "    BASEARCH: ${BASEARCH}"
 echo
 echo "    LOCAL_BUILD_PROPERTIES_DIR: ${LOCAL_BUILD_PROPERTIES_DIR}"
 echo
-echo "    remember to check that X virtual frame buffer is running for headless JUnit testing";
+echo "    remember to check that X virtual frame buffer is running for display :$DISPLAYNUMBER for headless unit tests";
 ps -ef | grep Xvfb
 echo