diff --git a/inc/mod/pages.php b/inc/mod/pages.php
index 0bbd7065..f743528f 100644
--- a/inc/mod/pages.php
+++ b/inc/mod/pages.php
@@ -854,7 +854,7 @@ function mod_ip_remove_note(Context $ctx, $ip, $id) {
             error($config['error']['noaccess']);
 
     if (filter_var($ip, FILTER_VALIDATE_IP) === false)
-        error("Invalid IP address.");
+        error('Invalid IP address');
 
     $query = prepare('DELETE FROM ``ip_notes`` WHERE `ip` = :ip AND `id` = :id');
     $query->bindValue(':ip', $ip);
@@ -870,7 +870,7 @@ function mod_ip(Context $ctx, $ip, string $encoded_cursor = null) {
     global $config, $mod;
 
     if (filter_var($ip, FILTER_VALIDATE_IP) === false)
-        error("Invalid IP address.");
+        error('Invalid IP address');
 
     if (isset($_POST['ban_id'], $_POST['unban'])) {
         if (!hasPermission($config['mod']['unban']))
@@ -922,7 +922,7 @@ function mod_user_posts_by_ip(Context $ctx, string $ip, string $encoded_cursor =
     global $mod;
 
     if (\filter_var($ip, \FILTER_VALIDATE_IP) === false){
-        error("Invalid IP address.");
+        error('Invalid IP address');
     }
 
     $config = $ctx->get('config');