diff --git a/src/cpp.cpp b/src/cpp.cpp
--- a/src/cpp.cpp
+++ b/src/cpp.cpp
@@ -929,9 +929,9 @@
             return QString::fromUtf8(static_cast<const char*>(data), len);
         }
     };
-    typedef void (*qstring_set)(QString*, qstring_t*);
-    void set_qstring(QString* v, qstring_t* val) {
-        *v = *val;
+    typedef void (*qstring_set)(QString*, qstring_t);
+    void set_qstring(QString* v, qstring_t val) {
+        *v = val;
     }
 )";
     }
@@ -950,9 +950,9 @@
             return QByteArray(data, len);
         }
     };
-    typedef void (*qbytearray_set)(QByteArray*, qbytearray_t*);
-    void set_qbytearray(QByteArray* v, qbytearray_t* val) {
-        *v = *val;
+    typedef void (*qbytearray_set)(QByteArray*, qbytearray_t);
+    void set_qbytearray(QByteArray* v, qbytearray_t val) {
+        *v = val;
     }
 )";
     }