diff --git a/src/corelib/kernel/qcore_mac.mm b/src/corelib/kernel/qcore_mac.mm
index 8844a173c7c..8ec04643994 100644
--- a/src/corelib/kernel/qcore_mac.mm
+++ b/src/corelib/kernel/qcore_mac.mm
@@ -52,6 +52,7 @@ QT_BEGIN_NAMESPACE
 
 // --------------------------------------------------------------------------
 
+#if defined(Q_OS_MACOS)
 static void initializeStandardUserDefaults()
 {
     // The standard user defaults are initialized from an ordered list of domains,
@@ -64,6 +65,7 @@ static void initializeStandardUserDefaults()
     Q_UNUSED(NSUserDefaults.standardUserDefaults);
 }
 Q_CONSTRUCTOR_FUNCTION(initializeStandardUserDefaults);
+#endif
 
 // --------------------------------------------------------------------------
 
diff --git a/src/corelib/text/qlocale_mac.mm b/src/corelib/text/qlocale_mac.mm
index 1236cd9e18c..65891d6a3b0 100644
--- a/src/corelib/text/qlocale_mac.mm
+++ b/src/corelib/text/qlocale_mac.mm
@@ -32,9 +32,11 @@ static void printLocalizationInformation()
     if (!lcLocale().isDebugEnabled())
         return;
 
+#if defined(Q_OS_MACOS)
     // Trigger initialization of standard user defaults, so that Foundation picks
     // up -AppleLanguages and -AppleLocale passed on the command line.
     Q_UNUSED(NSUserDefaults.standardUserDefaults);
+#endif
 
     auto singleLineDescription = [](NSArray *array) {
         NSString *str = [array description];