diff -bu GBrowse-2.55-vnBghT/install_util/GBrowseInstall.pm~ GBrowse-2.55-vnBghT/install_util/GBrowseInstall.pm
--- GBrowse-2.55-vnBghT/install_util/GBrowseInstall.pm~	2013-07-10 09:50:05.000000000 -0500
+++ GBrowse-2.55-vnBghT/install_util/GBrowseInstall.pm	2013-07-24 10:13:53.693624425 -0500
@@ -992,7 +992,7 @@
 
 sub perl5lib {
     my $self = shift;
-    return $self->added_to_INC or undef;
+    return $self->added_to_INC || undef;
 }
 
 sub scriptdir {