diff --git a/src/tools/ntqstring.h b/src/tools/ntqstring.h
index c2ef2a5e..ce9ccf10 100644
--- a/src/tools/ntqstring.h
+++ b/src/tools/ntqstring.h
@@ -244,6 +244,12 @@ public:
     friend inline bool operator<=( char ch, TQChar c );
     friend inline bool operator<=( TQChar c1, TQChar c2 );
 
+#if defined(__cplusplus) && __cplusplus >= 201103L
+    // Explicit declarations to suppress warnings
+    // This could be removed when TQChar( const TQChar& c ) is removed
+    TQChar& operator=(const TQChar& other) = default;
+    ~TQChar() = default;
+#endif
 private:
     ushort ucs;
 #if defined(QT_QSTRING_UCS_4)
@@ -769,6 +775,12 @@ public:
 
     // all this is not documented: We just say "like TQChar" and let it be.
 #ifndef Q_QDOC
+#if defined(__cplusplus) && __cplusplus >= 201103L
+    // tells compiler that we know what we are doing and suppresses -Wdeprecated-copy warnings
+    TQCharRef(const TQCharRef&) = default;
+    ~TQCharRef() = default;
+#endif
+
     ushort unicode() const { return s.constref(p).unicode(); }
     char latin1() const { return s.constref(p).latin1(); }