diff --git a/cfg/std.cfg b/cfg/std.cfg
index d67c17498..39b1a43c4 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -6250,7 +6250,7 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
     <use-retval/>
     <noreturn>false</noreturn>
   </function>
-  <!-- char& at(size_t pos); -->
+  <!--       char& at(size_t pos); -->
   <!-- const char& at(size_t pos) const; -->
   <function name="std::string::at">
     <use-retval/>
@@ -6261,6 +6261,39 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
       <valid>0:</valid>
     </arg>
   </function>
+  <!--       wchar_t& std::wstring::at(size_t pos); -->
+  <!-- const wchar_t& std::wstring::at(size_t pos) const; -->
+  <function name="std::wstring::at">
+    <use-retval/>
+    <returnValue type="wchar_t &amp;"/>
+    <noreturn>false</noreturn>
+    <arg nr="1">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
+  </function>
+  <!--       char16_t& std::u16string::at(size_t pos); -->
+  <!-- const char16_t& std::u16string::at(size_t pos) const; -->
+  <function name="std::u16string::at">
+    <use-retval/>
+    <returnValue type="char16_t &amp;"/>
+    <noreturn>false</noreturn>
+    <arg nr="1">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
+  </function>
+  <!--       char32_t& std::u32string::at(size_t pos); -->
+  <!-- const char32_t& std::u32string::at(size_t pos) const; -->
+  <function name="std::u32string::at">
+    <use-retval/>
+    <returnValue type="char32_t &amp;"/>
+    <noreturn>false</noreturn>
+    <arg nr="1">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
+  </function>
   <!-- void push_back (char c); -->
   <function name="std::string::push_back">
     <noreturn>false</noreturn>
@@ -7138,6 +7171,10 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
   <podtype name="intmax_t,std::intmax_t" sign="s"/>
   <podtype name="uintmax_t,std::uintmax_t" sign="u"/>
   <podtype name="size_t" sign="u"/>
+  <podtype name="std::string::size_type" sign="u"/>
+  <podtype name="std::wstring::size_type" sign="u"/>
+  <podtype name="std::u16string::size_type" sign="u"/>
+  <podtype name="std::u32string::size_type" sign="u"/>
   <!-- rsize_t is a typedef for size_t -->
   <podtype name="rsize_t" sign="u"/>
   <podtype name="double_t"/>