diff --git a/include/class_standAlonePage.inc b/include/class_standAlonePage.inc
index 907832952dc05b87565b78001797da3c9404a9fd..91ac1aab6429f6821d6a55014713e0982ad538b3 100644
--- a/include/class_standAlonePage.inc
+++ b/include/class_standAlonePage.inc
@@ -265,7 +265,7 @@ abstract class standAlonePage
     $max        = strlen($base) - 1;
     $randomhash = '';
     while (strlen($randomhash) < $len + 1) {
-      $randomhash .= $base{random_int(0, $max)};
+      $randomhash .= $base[random_int(0, $max)];
     }
     return $randomhash;
   }