diff --git a/app/Authentication/Repository/UserRepositorySearchFilter.php b/app/Authentication/Repository/UserRepositorySearchFilter.php
index ed9dcfd..8bd83ad 100755
--- a/app/Authentication/Repository/UserRepositorySearchFilter.php
+++ b/app/Authentication/Repository/UserRepositorySearchFilter.php
@@ -129,7 +129,7 @@ private function isSettedInputFilter(array $input_filter)
      */
     private function isValidFilterValue($value)
     {
-        return $value !== '';
+        return !empty($value);
     }
 
     /**