diff --git a/web/source/text/defaultOutput.ts b/web/source/text/defaultOutput.ts
index 8c50d317cc..0590f3795f 100644
--- a/web/source/text/defaultOutput.ts
+++ b/web/source/text/defaultOutput.ts
@@ -29,7 +29,7 @@ namespace com.keyman.text {
       var char = '';
 
       // A pretty simple table of lookups, corresponding VERY closely to the original defaultKeyOutput.
-      if(char = DefaultOutput.forSpecialEmulation(Lkc)) {
+      if((char = DefaultOutput.forSpecialEmulation(Lkc)) !== '') {
         return char;
       } else if(!isMnemonic && (char = DefaultOutput.forNumpadKeys(Lkc))) {
         return char;
@@ -244,4 +244,4 @@ namespace com.keyman.text {
       return '';
     }
   }
-}
\ No newline at end of file
+}