diff --git a/C4/InstallAuth.pm b/C4/InstallAuth.pm
index 67319b3db6..84817ce8ad 100644
--- a/C4/InstallAuth.pm
+++ b/C4/InstallAuth.pm
@@ -385,7 +385,7 @@ sub checkauth {
     $template->param( login => 1 );
     $template->param( loginprompt => 1 ) unless $info{'nopermission'};
 
-    if ($info{'invalid_username_or_password'} == 1) {
+    if ($info{'invalid_username_or_password'} && $info{'invalid_username_or_password'} == 1) {
                 $template->param( 'invalid_username_or_password' => $info{'invalid_username_or_password'});
     }