diff --git a/src/wireviz/wv_bom.py b/src/wireviz/wv_bom.py
index 78505aa..c1075da 100644
--- a/src/wireviz/wv_bom.py
+++ b/src/wireviz/wv_bom.py
@@ -138,7 +138,8 @@ def bom_list(bom: List[BOMEntry]) -> List[List[str]]:
     for fieldname in BOM_COLUMNS_OPTIONAL:  # Include only those optional BOM columns that are in use.
         if any(entry.get(fieldname) for entry in bom):
             keys.append(fieldname)
-    # list of staic bom header names,  headers not specified here are generated by capitilising the internal name
+    # Custom mapping from internal name to BOM column headers.
+    # Headers not specified here are generated by capitilising the internal name.
     bom_headings = {
         "description": "Item",  # TODO: Remove this line to use 'Description' in BOM heading.
         "pn": "P/N",