1 files changed, 1 insertions, 1 deletions
diff --git a/Bugzilla/Config/Common.pm b/Bugzilla/Config/Common.pm
index 4ca48b839..ee6e9fe47 100644
--- a/Bugzilla/Config/Common.pm
+++ b/Bugzilla/Config/Common.pm
@@ -189,7 +189,7 @@ sub check_shadowdb {
 
 sub check_urlbase {
     my ($url) = (@_);
-    if ($url !~ m:^http.*/$:) {
+    if ($url && $url !~ m:^http.*/$:) {
         return "must be a legal URL, that starts with http and ends with a slash.";
     }
     return "";