diff --git a/src/zcl_excel_writer_csv.clas.abap b/src/zcl_excel_writer_csv.clas.abap
index 5c1bd82..23f6853 100644
--- a/src/zcl_excel_writer_csv.clas.abap
+++ b/src/zcl_excel_writer_csv.clas.abap
@@ -60,6 +60,10 @@ CLASS zcl_excel_writer_csv IMPLEMENTATION.
 
 * .csv format with ; delimiter
 
+* Start of insertion # issue 1134 - Dateretention of cellstyles(issue #139)
+    me->excel->add_static_styles( ).
+* End of insertion # issue 1134 - Dateretention of cellstyles(issue #139)
+
     ep_excel = me->create_csv( ).
 
   ENDMETHOD.