diff --git a/src/lib/efl/interfaces/efl_ui_format.eo b/src/lib/efl/interfaces/efl_ui_format.eo
index 2f386dafa7..38647d33fb 100644
--- a/src/lib/efl/interfaces/efl_ui_format.eo
+++ b/src/lib/efl/interfaces/efl_ui_format.eo
@@ -3,7 +3,7 @@ import eina_types;
 function Efl.Ui.Format_Func_Cb {
    [[Function pointer for format function hook]]
    params {
-      @in str: ptr(Eina.Strbuf); [[the formated string to be appended by user.]]
+      @in str: strbuf; [[the formated string to be appended by user.]]
       @in value: const(any_value); [[The Eina.Value passed by $obj.]]
    }
 };