diff --git a/autotests/kconfig_compiler/test10.cpp.ref b/autotests/kconfig_compiler/test10.cpp.ref
--- a/autotests/kconfig_compiler/test10.cpp.ref
+++ b/autotests/kconfig_compiler/test10.cpp.ref
@@ -11,6 +11,8 @@
   public:
     Test10Helper() : q(nullptr) {}
     ~Test10Helper() { delete q; }
+    Test10Helper(const Test10Helper&) = delete;
+    Test10Helper& operator=(const Test10Helper&) = delete;
     Test10 *q;
 };
 Q_GLOBAL_STATIC(Test10Helper, s_globalTest10)
diff --git a/autotests/kconfig_compiler/test4.cpp.ref b/autotests/kconfig_compiler/test4.cpp.ref
--- a/autotests/kconfig_compiler/test4.cpp.ref
+++ b/autotests/kconfig_compiler/test4.cpp.ref
@@ -11,6 +11,8 @@
   public:
     Test4Helper() : q(nullptr) {}
     ~Test4Helper() { delete q; }
+    Test4Helper(const Test4Helper&) = delete;
+    Test4Helper& operator=(const Test4Helper&) = delete;
     Test4 *q;
 };
 Q_GLOBAL_STATIC(Test4Helper, s_globalTest4)
diff --git a/autotests/kconfig_compiler/test5.cpp.ref b/autotests/kconfig_compiler/test5.cpp.ref
--- a/autotests/kconfig_compiler/test5.cpp.ref
+++ b/autotests/kconfig_compiler/test5.cpp.ref
@@ -11,6 +11,8 @@
   public:
     Test5Helper() : q(nullptr) {}
     ~Test5Helper() { delete q; }
+    Test5Helper(const Test5Helper&) = delete;
+    Test5Helper& operator=(const Test5Helper&) = delete;
     Test5 *q;
 };
 Q_GLOBAL_STATIC(Test5Helper, s_globalTest5)
diff --git a/autotests/kconfig_compiler/test8b.cpp.ref b/autotests/kconfig_compiler/test8b.cpp.ref
--- a/autotests/kconfig_compiler/test8b.cpp.ref
+++ b/autotests/kconfig_compiler/test8b.cpp.ref
@@ -11,6 +11,8 @@
   public:
     Test8bHelper() : q(nullptr) {}
     ~Test8bHelper() { delete q; }
+    Test8bHelper(const Test8bHelper&) = delete;
+    Test8bHelper& operator=(const Test8bHelper&) = delete;
     Test8b *q;
 };
 Q_GLOBAL_STATIC(Test8bHelper, s_globalTest8b)
diff --git a/autotests/kconfig_compiler/test8c.cpp.ref b/autotests/kconfig_compiler/test8c.cpp.ref
--- a/autotests/kconfig_compiler/test8c.cpp.ref
+++ b/autotests/kconfig_compiler/test8c.cpp.ref
@@ -13,6 +13,8 @@
   public:
     Test8cHelper() : q(nullptr) {}
     ~Test8cHelper() { delete q; }
+    Test8cHelper(const Test8cHelper&) = delete;
+    Test8cHelper& operator=(const Test8cHelper&) = delete;
     Test8c *q;
 };
 Q_GLOBAL_STATIC(Test8cHelper, s_globalTest8c)
diff --git a/autotests/kconfig_compiler/test_dpointer.cpp.ref b/autotests/kconfig_compiler/test_dpointer.cpp.ref
--- a/autotests/kconfig_compiler/test_dpointer.cpp.ref
+++ b/autotests/kconfig_compiler/test_dpointer.cpp.ref
@@ -50,6 +50,8 @@
   public:
     TestDPointerHelper() : q(nullptr) {}
     ~TestDPointerHelper() { delete q; }
+    TestDPointerHelper(const TestDPointerHelper&) = delete;
+    TestDPointerHelper& operator=(const TestDPointerHelper&) = delete;
     TestDPointer *q;
 };
 Q_GLOBAL_STATIC(TestDPointerHelper, s_globalTestDPointer)
diff --git a/autotests/kconfig_compiler/test_signal.cpp.ref b/autotests/kconfig_compiler/test_signal.cpp.ref
--- a/autotests/kconfig_compiler/test_signal.cpp.ref
+++ b/autotests/kconfig_compiler/test_signal.cpp.ref
@@ -11,6 +11,8 @@
   public:
     TestSignalHelper() : q(nullptr) {}
     ~TestSignalHelper() { delete q; }
+    TestSignalHelper(const TestSignalHelper&) = delete;
+    TestSignalHelper& operator=(const TestSignalHelper&) = delete;
     TestSignal *q;
 };
 Q_GLOBAL_STATIC(TestSignalHelper, s_globalTestSignal)
diff --git a/src/kconfig_compiler/kconfig_compiler.cpp b/src/kconfig_compiler/kconfig_compiler.cpp
--- a/src/kconfig_compiler/kconfig_compiler.cpp
+++ b/src/kconfig_compiler/kconfig_compiler.cpp
@@ -2300,6 +2300,8 @@
         cpp << "  public:" << endl;
         cpp << "    " << cfg.className << "Helper() : q(nullptr) {}" << endl;
         cpp << "    ~" << cfg.className << "Helper() { delete q; }" << endl;
+        cpp << "    " << cfg.className << "Helper(const " << cfg.className << "Helper&) = delete;" << endl;
+        cpp << "    " << cfg.className << "Helper& operator=(const " << cfg.className << "Helper&) = delete;" << endl;
         cpp << "    " << cfg.className << " *q;" << endl;
         cpp << "};" << endl;
         endNamespaces(cfg.nameSpace, cpp);