diff --git a/cfg/windows.cfg b/cfg/windows.cfg
index 99240ee57..1771e483e 100644
--- a/cfg/windows.cfg
+++ b/cfg/windows.cfg
@@ -4946,6 +4946,23 @@ HFONT CreateFont(
       <not-uninit/>
       <strz/>
     </arg>
+  </function>
+    <!-- PWSTR StrCatW(PWSTR psz1, PCWSTR psz2); -->
+  <function name="StrCatW">
+    <returnValue type="PWSTR"/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <not-overlapping-data ptr1-arg="1" ptr2-arg="2" strlen-arg="2"/>
+    <arg nr="1" direction="inout">
+      <not-null/>
+      <not-uninit/>
+      <strz/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-null/>
+      <not-uninit/>
+      <strz/>
+    </arg>
   </function>
   <!--LPWSTR lstrcatW( _Inout_ LPWSTR lpString1, _In_ LPCWSTR lpString2);-->
   <!-- TODO: When implemented use minsize for argument 1 to verify that the