diff --git a/contrib/rotate-screen/rotate-screen b/contrib/rotate-screen/rotate-screen
index 1bc317712..62d38df4a 100755
--- a/contrib/rotate-screen/rotate-screen
+++ b/contrib/rotate-screen/rotate-screen
@@ -37,7 +37,7 @@ if test -z $XINPUT; then
 fi
 
 XRANDR=`which xrandr`
-if test -z $GDBUS; then
+if test -z $XRANDR; then
     echo "Command 'xrandr' not found."
 fi