diff --git a/gui/dialogs/weather_scenario.xml b/gui/dialogs/weather_scenario.xml
index eeb6a406e..815836683 100644
--- a/gui/dialogs/weather_scenario.xml
+++ b/gui/dialogs/weather_scenario.xml
@@ -34,7 +34,7 @@
       <binding>
         <command>nasal</command>
         <script>
-          setprop("/environment/rebuild_layers", getprop("/environment/rebuild_layers")+1);
+          setprop("/environment/rebuild-layers", getprop("/environment/rebuild-layers")+1);
         </script>
       </binding>
     </combo>