diff --git a/dbus-examples/inverter.sh b/dbus-examples/inverter.sh
index abe6e13..e13cb2d 100755
--- a/dbus-examples/inverter.sh
+++ b/dbus-examples/inverter.sh
@@ -29,7 +29,7 @@ SED="${SED:-$(command -v gsed || printf 'sed')}"
 dpy=$(printf "$DISPLAY" | tr -c '[:alnum:]' _)
 
 if [ -z "$dpy" ]; then
-  echo "Cannot find display."
+  stderr "Cannot find display."
   exit 1
 fi