diff --git a/i3_switch_monitor.sh b/i3_switch_monitor.sh
index 34715b0..2bf4ce1 100755
--- a/i3_switch_monitor.sh
+++ b/i3_switch_monitor.sh
@@ -2,6 +2,7 @@
 
 MONITOR1_WIDTH=$1
 MONITOR2_WIDTH=$2
+MONITOR3_WIDTH=$3
 
 getMouseX() {
 	xdotool getmouselocation 2>/dev/null | awk '{ print $1 }' | cut -d: -f2
@@ -9,9 +10,11 @@ getMouseX() {
 
 getMouveNextX() {
 	if [ $(getMouseX) -lt $MONITOR1_WIDTH ]; then
-		echo "$MONITOR1_WIDTH+$MONITOR2_WIDTH/2-10" | bc
+		echo $(($MONITOR1_WIDTH + $MONITOR2_WIDTH / 2 - 10))
+	elif [ $(getMouseX) -lt $(($MONITOR1_WIDTH + $MONITOR2_WIDTH)) ]; then
+		echo $(($MONITOR1_WIDTH + $MONITOR2_WIDTH + $MONITOR3_WIDTH / 2 - 10))
 	else
-		echo "$MONITOR1_WIDTH/2-10" | bc
+		echo $((MONITOR1_WIDTH / 2 - 10))
 	fi
 }
 
diff --git a/i3_switch_monitor_wrapper.sh b/i3_switch_monitor_wrapper.sh
index d40644c..12570ee 100755
--- a/i3_switch_monitor_wrapper.sh
+++ b/i3_switch_monitor_wrapper.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-exec ~/bin/i3_switch_monitor.sh 1920 1920
+exec ~/bin/i3_switch_monitor.sh 1920 1920 1024