diff --git a/src/plugins/platforms/cocoa/qcocoahelpers.h b/src/plugins/platforms/cocoa/qcocoahelpers.h
index bb187c9fa75..1ef62e1323b 100644
--- a/src/plugins/platforms/cocoa/qcocoahelpers.h
+++ b/src/plugins/platforms/cocoa/qcocoahelpers.h
@@ -193,7 +193,7 @@ constexpr backwards_t<R> backwards(R&& r) { return {std::forward<R>(r)}; }
 
 // -------------------------------------------------------------------------
 
-#if !defined(Q_PROCESSOR_X86_64)
+#if QT_POINTER_SIZE == 4
 #error "32-bit builds are not supported"
 #endif
 
diff --git a/src/plugins/platforms/cocoa/qcocoahelpers.mm b/src/plugins/platforms/cocoa/qcocoahelpers.mm
index 6c21d1a3743..cad5979e0fd 100644
--- a/src/plugins/platforms/cocoa/qcocoahelpers.mm
+++ b/src/plugins/platforms/cocoa/qcocoahelpers.mm
@@ -370,10 +370,6 @@ QString qt_mac_removeAmpersandEscapes(QString s)
 
 // -------------------------------------------------------------------------
 
-#if !defined(Q_PROCESSOR_X86_64)
-#error "32-bit builds are not supported"
-#endif
-
 QOperatingSystemVersion QMacVersion::buildSDK(VersionTarget target)
 {
     switch (target) {