diff --git a/src/corelib/kernel/qcore_mac_objc.mm b/src/corelib/kernel/qcore_mac_objc.mm
index 9e9e71c397..b1f3b74cd4 100644
--- a/src/corelib/kernel/qcore_mac_objc.mm
+++ b/src/corelib/kernel/qcore_mac_objc.mm
@@ -211,6 +211,12 @@ QDebug operator<<(QDebug debug, const QMacAutoReleasePool *pool)
     debug << "QMacAutoReleasePool(" << (const void *)pool << ')';
     return debug;
 }
+
+QDebug operator<<(QDebug debug, const QCFString &string)
+{
+    debug << static_cast<QString>(string);
+    return debug;
+}
 #endif // !QT_NO_DEBUG_STREAM
 
 #ifdef Q_OS_MACOS
diff --git a/src/corelib/kernel/qcore_mac_p.h b/src/corelib/kernel/qcore_mac_p.h
index 270b8fcf0f..d03e2f3738 100644
--- a/src/corelib/kernel/qcore_mac_p.h
+++ b/src/corelib/kernel/qcore_mac_p.h
@@ -169,6 +169,7 @@ Q_CORE_EXPORT bool qt_mac_applicationIsInDarkMode();
 
 #ifndef QT_NO_DEBUG_STREAM
 Q_CORE_EXPORT QDebug operator<<(QDebug debug, const QMacAutoReleasePool *pool);
+Q_CORE_EXPORT QDebug operator<<(QDebug debug, const QCFString &string);
 #endif
 
 Q_CORE_EXPORT bool qt_apple_isApplicationExtension();