diff --git a/admin/operators.php b/admin/operators.php
index 26d936d6..05d93a8c 100644
--- a/admin/operators.php
+++ b/admin/operators.php
@@ -160,7 +160,7 @@ if (isset($_POST['operator']))
 		}
 		else
 		{
-			$a = T_("Could not add operator. There may already be an operator of this name:") . " $operator" ;
+			$a = T_("Could not add operator. There may already be an operator of this name:") . " $operator " . T_("Or there may already be an telephone extension number") . ":$extension"  ;
 		}