diff --git a/src/corelib/kernel/qmetatype.h b/src/corelib/kernel/qmetatype.h
index cdad83a4670..70cf942a4a1 100644
--- a/src/corelib/kernel/qmetatype.h
+++ b/src/corelib/kernel/qmetatype.h
@@ -2268,6 +2268,20 @@ struct QDataStreamOperatorForType <T, false>
     static constexpr QMetaTypeInterface::DataStreamInFn dataStreamIn = nullptr;
 };
 
+// Performance optimization:
+//
+// Don't add all these symbols to the dynamic symbol tables on ELF systems and
+// on Darwin. Each library is going to have a copy anyway and QMetaType already
+// copes with some of these being "hidden" (see QMetaType::idHelper()). We may
+// as well let the linker know it can always use the local copy.
+//
+// This is currently not enabled for GCC due to
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106023
+
+#if !defined(Q_OS_WIN) && defined(Q_CC_CLANG)
+#  pragma GCC visibility push(hidden)
+#endif
+
 template<typename S>
 class QMetaTypeForType
 {
@@ -2358,6 +2372,9 @@ struct QMetaTypeInterfaceWrapper
     };
 };
 
+#if !defined(Q_OS_WIN) && defined(Q_CC_CLANG)
+#  pragma GCC visibility pop
+#endif
 
 template<>
 class QMetaTypeInterfaceWrapper<void>
diff --git a/tests/auto/corelib/kernel/qmetatype/tst_qmetatype2.cpp b/tests/auto/corelib/kernel/qmetatype/tst_qmetatype2.cpp
index 11dc593ebb7..265ec3095f5 100644
--- a/tests/auto/corelib/kernel/qmetatype/tst_qmetatype2.cpp
+++ b/tests/auto/corelib/kernel/qmetatype/tst_qmetatype2.cpp
@@ -522,6 +522,14 @@ void tst_QMetaType::operatorEqAcrossLibs()
     QCOMPARE(QByteArray(lib2Type.name()), QByteArray(localType.name()));
     QCOMPARE(lib1Type, localType);
     QCOMPARE(lib2Type, localType);
+
+#if !defined(Q_OS_WIN) && !defined(Q_OS_INTEGRITY)
+    if (actualTypeId < QMetaType::FirstGuiType && actualTypeId != QMetaType::Void) {
+        // for built-in QtCore types, we expect the interfaces to be the same too
+        QCOMPARE(lib1Iface, localIface);
+        QCOMPARE(lib2Iface, localIface);
+    }
+#endif
 }
 
 class WithPrivateDTor {