diff --git a/hosts/common/programs/sane-input-handler/sane-input-handler b/hosts/common/programs/sane-input-handler/sane-input-handler
index 8ccde6d29..18813d17e 100755
--- a/hosts/common/programs/sane-input-handler/sane-input-handler
+++ b/hosts/common/programs/sane-input-handler/sane-input-handler
@@ -569,7 +569,7 @@ if is-main {
     exit 0
   }
 
-  var handler = mapToplevel (action) or unmapped
+  var handler = mapToplevel (action) or "unmapped"
 
   handleWith (handler)
 }