diff --git a/user/index.php b/user/index.php
index 970e9ccdbb4..c6031591e3e 100644
--- a/user/index.php
+++ b/user/index.php
@@ -72,7 +72,7 @@
         }
     }
 
-    if ($sort = lastaccess) {
+    if ($sort = "lastaccess") {
         $dsort = "s.timeaccess";
     } else {
         $dsort = "u.$sort";