diff --git a/cron-rest-eyes b/cron-rest-eyes
index 9ed7671..2fa5bf8 100755
--- a/cron-rest-eyes
+++ b/cron-rest-eyes
@@ -1,10 +1,17 @@
 #!/bin/sh
 
 # no message if one is displayed already
-if [[ "`ps -efww | grep -v grep | grep gxmessage`" == "" ]]; then
-    # no message if screensaver active
-    if [ "`ps -efww | grep -v grep | grep xscreensaver`" == "" ]; then
-        export DISPLAY=:0
-        gxmessage 'Rest your eyes!'
-    fi
+if [[ "$(ps -efww | grep -v grep | grep gxmessage)" != "" ]]; then
+    exit
 fi
+# no message if xscreensaver active
+if [ "$(ps -efww | grep -v grep | grep xscreensaver)" != "" ]; then
+    exit
+fi
+# no message if gnome-screensaver active
+if [ "$(gnome-screensaver-command --query | grep is.active)" != "" ]; then
+    exit
+fi
+
+export DISPLAY=:0
+gxmessage 'Rest your eyes!'