diff --git a/src/plugins/platforms/cocoa/qcocoahelpers.h b/src/plugins/platforms/cocoa/qcocoahelpers.h
index 2aaff8c4ce9..456129ffec5 100644
--- a/src/plugins/platforms/cocoa/qcocoahelpers.h
+++ b/src/plugins/platforms/cocoa/qcocoahelpers.h
@@ -178,7 +178,7 @@ T qt_mac_resolveOption(const T &fallback, QWindow *window, const QByteArray &pro
 
 // -------------------------------------------------------------------------
 
-#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 d36a7f6d09b..240f184be47 100644
--- a/src/plugins/platforms/cocoa/qcocoahelpers.mm
+++ b/src/plugins/platforms/cocoa/qcocoahelpers.mm
@@ -372,10 +372,6 @@ 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) {