diff --git a/kasten/controllers/view/structures/script/safereference.cpp b/kasten/controllers/view/structures/script/safereference.cpp
index f7fe1e4d..7d6b2b9a 100644
--- a/kasten/controllers/view/structures/script/safereference.cpp
+++ b/kasten/controllers/view/structures/script/safereference.cpp
@@ -1,54 +1,56 @@
 /*
  *   This file is part of the Okteta Kasten Framework, made within the KDE community.
  *
  *   Copyright 2013 Alex Richardson <alex.richardson@gmx.de>
  *
  *   This library is free software; you can redistribute it and/or
  *   modify it under the terms of the GNU Lesser General Public
  *   License as published by the Free Software Foundation; either
  *   version 2.1 of the License, or (at your option) version 3, or any
  *   later version accepted by the membership of KDE e.V. (or its
  *   successor approved by the membership of KDE e.V.), which shall
  *   act as a proxy defined in Section 6 of version 3 of the license.
  *
  *   This library is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *   Lesser General Public License for more details.
  *
  *   You should have received a copy of the GNU Lesser General Public
  *   License along with this library. If not, see <http://www.gnu.org/licenses/>.
  */
 #include "safereference.h"
 #include "../structlogging.h"
 // #include "../datatypes/datainformation.h"
 
 #include <cstdio>
 
 SafeReferenceHolder SafeReferenceHolder::instance;
 
 SafeReferenceHolder::SafeReferenceHolder() = default;
 
 SafeReferenceHolder::~SafeReferenceHolder()
 {
     if (mRefs.size() > 0) {
         qCWarning(LOG_KASTEN_OKTETA_CONTROLLERS_STRUCTURES) << mRefs.size() << "safe references were not removed";
     }
-    printf("register count: %d, destroy count %d: ", safeRefRegisterCnt, safeRefDestroyCnt);
+#ifndef NDEBUG
+   printf("register count: %d, destroy count: %d\n", safeRefRegisterCnt, safeRefDestroyCnt);
+#endif
 }
 
 void SafeReferenceHolder::invalidateAll(DataInformation* data)
 {
     // this is called from DataInformation destructor, don't do anything with data!
     Container::iterator i = mRefs.find(data);
     // qCDebug(LOG_KASTEN_OKTETA_CONTROLLERS_STRUCTURES) << "invalidating all references to" << data->name();
     while (i != mRefs.end() && i.key() == data) {
         // qCDebug(LOG_KASTEN_OKTETA_CONTROLLERS_STRUCTURES) << "invalidating" << i.value();
         i.value()->invalidate();
         ++i;
     }
     // remove all this items from the list
     int removed = mRefs.remove(data);
     safeRefDestroyCnt += removed;
     // qCDebug(LOG_KASTEN_OKTETA_CONTROLLERS_STRUCTURES) << "removed" << removed << "items";
 }