diff --git a/cfg/std.cfg b/cfg/std.cfg
index c825f7ccc..e41712d6d 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -6451,21 +6451,21 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
     <noreturn>false</noreturn>
     <leak-ignore/>
     <returnValue type="std::string &amp;"/>
-    <arg nr="1"/>
+    <arg nr="any"/>
   </function>
   <!-- std::wstring& std::wstring::append (const std::wstring& str); -->
   <function name="std::wstring::append">
     <noreturn>false</noreturn>
     <leak-ignore/>
     <returnValue type="std::wstring &amp;"/>
-    <arg nr="1"/>
+    <arg nr="any"/>
   </function>
   <!-- std::basic_string& std::basic_string::append (const std::basic_string& str); -->
   <function name="std::basic_string::append">
     <noreturn>false</noreturn>
     <leak-ignore/>
     <returnValue type="std::basic_string &amp;"/>
-    <arg nr="1"/>
+    <arg nr="any"/>
   </function>
   <!-- void reserve (size_t n = 0); -->
   <function name="std::string::reserve,std::wstring::reserve,std::basic_string::reserve">