diff --git a/src/tools/cplusplus-mkvisitor/cplusplus-mkvisitor.cpp b/src/tools/cplusplus-mkvisitor/cplusplus-mkvisitor.cpp
index fe3fadd4f7d..2a6f7b1ac30 100644
--- a/src/tools/cplusplus-mkvisitor/cplusplus-mkvisitor.cpp
+++ b/src/tools/cplusplus-mkvisitor/cplusplus-mkvisitor.cpp
@@ -403,7 +403,7 @@ protected:
         if (Symbol *s = klass->find(accept0)) {
             if (Function *meth = s->type()->asFunctionType()) {
                 if (! meth->isPureVirtual()) {
-                    for (const ClassOrNamespace *u : b->usings()) {
+                    for (ClassOrNamespace *u : b->usings()) {
                         if (interfaces.contains(u)) {
                             // qDebug() << oo(klass->name()) << "implements" << oo(u->symbols().first()->name());
                         } else {