diff --git a/docs/internals/CODE_STYLE.md b/docs/internals/CODE_STYLE.md
index f908bf927b..24e669c35b 100644
--- a/docs/internals/CODE_STYLE.md
+++ b/docs/internals/CODE_STYLE.md
@@ -338,6 +338,7 @@ This is the full list of functions generally banned.
     _tcsncat
     _waccess
     _wcscat
+    _wcsdup
     _wcsncat
     access
     gets
@@ -357,7 +358,9 @@ This is the full list of functions generally banned.
     strncat
     strncpy
     strtok
+    strtok_r
     strtol
     strtoul
     vsnprint
     vsprintf
+    wcsdup