diff --git a/panda/src/express/textEncoder.I b/panda/src/express/textEncoder.I
index 7ee4b431ff..9100bdbf0d 100644
--- a/panda/src/express/textEncoder.I
+++ b/panda/src/express/textEncoder.I
@@ -334,7 +334,8 @@ unicode_isdigit(int character) {
     // The digits aren't actually listed in the map.
     return (character >= '0' && character <= '9');
   }
-  return isdigit(entry->_ascii_equiv);
+  // This silly test (!= 0) is necessary to prevent a VC++ warning.
+  return (isdigit(entry->_ascii_equiv) != 0);
 }
 
 ////////////////////////////////////////////////////////////////////