diff --git a/report_xlsx_helper/readme/CONTRIBUTORS.rst b/report_xlsx_helper/readme/CONTRIBUTORS.rst
index 56577cc5..dbf4d75b 100644
--- a/report_xlsx_helper/readme/CONTRIBUTORS.rst
+++ b/report_xlsx_helper/readme/CONTRIBUTORS.rst
@@ -1,2 +1,4 @@
 * Luc De Meyer <luc.demeyer@noviat.com>
 * Rattapong Chokmasermkul <rattapongc@ecosoft.co.th>
+* Saran Lim. <saranl@ecosoft.co.th>
+
diff --git a/report_xlsx_helper/report/report_xlsx_abstract.py b/report_xlsx_helper/report/report_xlsx_abstract.py
index 375fca82..26c7f891 100644
--- a/report_xlsx_helper/report/report_xlsx_abstract.py
+++ b/report_xlsx_helper/report/report_xlsx_abstract.py
@@ -569,6 +569,8 @@ class ReportXlsxAbstract(models.AbstractModel):
         col_specs_section=None,
         render_space=None,
         default_format=None,
+        col_specs='col_specs',
+        wanted_list='wanted_list',
     ):
         """
         Write a line with all columns included in the 'wanted_list'.
@@ -576,8 +578,8 @@ class ReportXlsxAbstract(models.AbstractModel):
         An empty cell will be written if no col_specs_section entry
         for a column.
         """
-        col_specs = ws_params.get("col_specs")
-        wl = ws_params.get("wanted_list") or []
+        col_specs = ws_params.get(col_specs)
+        wl = ws_params.get(wanted_list) or []
         pos = 0
         for col in wl:
             if col not in col_specs: