diff --git a/dll/win32/setupapi/driver.c b/dll/win32/setupapi/driver.c
index 88affa3c026..356a95c08db 100644
--- a/dll/win32/setupapi/driver.c
+++ b/dll/win32/setupapi/driver.c
@@ -565,7 +565,7 @@ done:
     return Result;
 }
 
-#if WIN32_WINNT < 0x0600
+#if _WIN32_WINNT < 0x0600
 /* WARNING:
  * This code has been copied from advapi32/reg/reg.c,
  * so this dll can be tested as is on Windows XP