diff --git a/src/zcl_excel_writer_csv.clas.abap b/src/zcl_excel_writer_csv.clas.abap
index ce44a31..b4d7d1e 100644
--- a/src/zcl_excel_writer_csv.clas.abap
+++ b/src/zcl_excel_writer_csv.clas.abap
@@ -26,9 +26,9 @@ CLASS zcl_excel_writer_csv DEFINITION
     CLASS-METHODS set_active_sheet_index_by_name
       IMPORTING
         !i_worksheet_name TYPE zexcel_worksheets_name .
-    class-methods SET_INITIAL_EXT_DATE
-      importing
-        !IP_VALUE type CHAR10 default 'DEFAULT' .
+    CLASS-METHODS set_initial_ext_date
+      IMPORTING
+        !ip_value TYPE char10 DEFAULT 'DEFAULT' .
   protected section.
 *"* private components of class ZCL_EXCEL_WRITER_CSV
 *"* do not include other source files here!!!