diff --git a/screencap/screencap-ffmpeg.sh b/screencap/screencap-ffmpeg.sh
index 48a2c766d604b93f0ffd56dd02de6f4e014b7966..d28c9909b19314613ab166b5026e2de53de77a0c 100755
--- a/screencap/screencap-ffmpeg.sh
+++ b/screencap/screencap-ffmpeg.sh
@@ -79,6 +79,6 @@ else
 	exit 1
 fi
 
-cmd="$prog -f x11grab -s $res -r $FPS -i :0.0$pos -r $FPS $audiocmd $videocmd $file"
+cmd="$prog -f x11grab -s $res -r $FPS -i $DISPLAY$pos -r $FPS $audiocmd $videocmd $file"
 echo "Command: $cmd"
 $cmd