diff --git a/bin/switch-to-laptop-screen b/bin/switch-to-laptop-screen
index 7de579f..b19a131 100755
--- a/bin/switch-to-laptop-screen
+++ b/bin/switch-to-laptop-screen
@@ -2,6 +2,8 @@
 
 set -ueo pipefail
 
+MONITOR_ID="${MONITOR_ID:-HDMI-1}"
+
 xrandr \
   --output eDP-1 --mode 1920x1200 \
-  --output DP-3 --off
+  --output "${MONITOR_ID}" --off
diff --git a/bin/switch-to-monitor b/bin/switch-to-monitor
index b6784ff..dea81a6 100755
--- a/bin/switch-to-monitor
+++ b/bin/switch-to-monitor
@@ -2,6 +2,8 @@
 
 set -ueo pipefail
 
+MONITOR_ID="${MONITOR_ID:-HDMI-1}"
+
 xrandr \
-  --output DP-3 --mode 2560x1440 \
+  --output "${MONITOR_ID}" --mode 2560x1440 \
   --output eDP-1 --off