diff --git a/src/ui/zcl_abapgit_html_toolbar.clas.abap b/src/ui/zcl_abapgit_html_toolbar.clas.abap
index a23c0be62..3a5447357 100644
--- a/src/ui/zcl_abapgit_html_toolbar.clas.abap
+++ b/src/ui/zcl_abapgit_html_toolbar.clas.abap
@@ -49,8 +49,8 @@ CLASS zcl_abapgit_html_toolbar DEFINITION
         act   TYPE string,
         ico   TYPE string,
         sub   TYPE REF TO zcl_abapgit_html_toolbar,
-        opt   TYPE char1,
-        typ   TYPE char1,
+        opt   TYPE c LENGTH 1,
+        typ   TYPE c LENGTH 1,
         cur   TYPE abap_bool,
         chk   TYPE abap_bool,
         aux   TYPE string,