diff --git a/bin/xsettingsd-setup b/bin/xsettingsd-setup
index 259ed68..088249b 100755
--- a/bin/xsettingsd-setup
+++ b/bin/xsettingsd-setup
@@ -2,7 +2,9 @@
 
 # Don't try to guess DPI. For a laptop, we don't want the same DPI as
 # for an external screen. Just hardcode stuff...
-case $(hostname),$(xrandr --current | sed -n 's/\([^ ]*\) connected .*/\1/p' | sort | tr '\n' ':') in
+case $(hostname),$(xrandr --current | \
+                          sed -n 's/\([^ ]*\) connected .*[0-9][0-9]*x[0-9][0-9]*+[0-9][0-9]*+[0-9][0-9]* .*/\1/p' | \
+                          sort | tr '\n' ':') in
     zoro,eDP1:) dpi=144 ;;
     *) dpi=96 ;;
 esac