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-rw-r--r--Bugzilla/Constants.pm2
1 files changed, 1 insertions, 1 deletions
diff --git a/Bugzilla/Constants.pm b/Bugzilla/Constants.pm
index 59e67faa5..f4c1d89d1 100644
--- a/Bugzilla/Constants.pm
+++ b/Bugzilla/Constants.pm
@@ -569,7 +569,7 @@ use constant PASSWORD_SALT_LENGTH => 8;
# via POST such as buglist.cgi. This value determines whether the redirect
# can be safely done or not based on the web server's URI length setting.
# See http://support.microsoft.com/kb/208427 for why MSIE is different
-use constant CGI_URI_LIMIT => $ENV{'HTTP_USER_AGENT'} =~ /MSIE/ ? 2083 : 8000;
+use constant CGI_URI_LIMIT => ($ENV{'HTTP_USER_AGENT'} || '') =~ /MSIE/ ? 2083 : 8000;
# If the user isn't allowed to change a field, we must tell him who can.
# We store the required permission set into the $PrivilegesRequired