diff --git a/winnativeeventfilter.cpp b/winnativeeventfilter.cpp
index 25f2d32..09b5511 100644
--- a/winnativeeventfilter.cpp
+++ b/winnativeeventfilter.cpp
@@ -328,7 +328,7 @@ WNEF_GENERATE_WINAPI(GetClientRect, BOOL, HWND, LPRECT)
 WNEF_GENERATE_WINAPI(GetWindowRect, BOOL, HWND, LPRECT)
 WNEF_GENERATE_WINAPI(ScreenToClient, BOOL, HWND, LPPOINT)
 WNEF_GENERATE_WINAPI(EqualRect, BOOL, CONST RECT *, CONST RECT *)
-#ifdef Q_PROCESSOR_X86_64
+#if defined(WIN64) || defined(_WIN64)
 WNEF_GENERATE_WINAPI(GetWindowLongPtrW, LONG_PTR, HWND, int)
 WNEF_GENERATE_WINAPI(SetWindowLongPtrW, LONG_PTR, HWND, int, LONG_PTR)
 WNEF_GENERATE_WINAPI(GetClassLongPtrW, ULONG_PTR, HWND, int)