diff --git a/mingw-w64-headers/include/winreg.h b/mingw-w64-headers/include/winreg.h
index 61b9b3b..c7caec8 100644
--- a/mingw-w64-headers/include/winreg.h
+++ b/mingw-w64-headers/include/winreg.h
@@ -370,8 +370,8 @@
 
 WINADVAPI LONG WINAPI RegSetKeyValueW(
   HKEY hKey,
-  LPCSTR lpSubKey,
-  LPCSTR lpValueName,
+  LPCWSTR lpSubKey,
+  LPCWSTR lpValueName,
   DWORD dwType,
   LPCVOID lpData,
   DWORD cbData