diff --git a/webtools/tinderbox/warnings-test.pl b/webtools/tinderbox/warnings-test.pl
index 2eee2ee81065..f06c2d79e633 100644
--- a/webtools/tinderbox/warnings-test.pl
+++ b/webtools/tinderbox/warnings-test.pl
@@ -155,7 +155,7 @@ sub build_file_hash {
 
   use File::Find;
   for my $include (@include_list) {
-    $include .= ",v" if $include =~ /\./;
+    $include .= ",v" unless -d "$cvsroot/$include";
     &find(\&find_cvs_files, "$cvsroot/$include"); 
   }
   return \%bases, \%fullpath;