diff --git a/mix/CMakeLists.txt b/mix/CMakeLists.txt
index 7272c4d99..6bcb76704 100644
--- a/mix/CMakeLists.txt
+++ b/mix/CMakeLists.txt
@@ -10,7 +10,7 @@ elseif ("${TARGET_PLATFORM}" STREQUAL "w64")
 	set(SRC_LIST ${SRC_LIST} ../windows/qt_plugin_import.cpp)
 	include_directories(/usr/x86_64-w64-mingw32/include /usr/x86_64-w64-mingw32/include/QtCore /usr/x86_64-w64-mingw32/include/QtGui /usr/x86_64-w64-mingw32/include/QtQuick /usr/x86_64-w64-mingw32/include/QtQml /usr/x86_64-w64-mingw32/include/QtNetwork /usr/x86_64-w64-mingw32/include/QtWidgets /usr/x86_64-w64-mingw32/include/QtWebKit /usr/x86_64-w64-mingw32/include/QtWebKitWidgets)
 elseif (UNIX)
-   set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} ";$ENV{QTDIR}/lib/cmake" /opt/Qt5.3.2/5.3/gcc_64/lib/cmake/Qt5Declarative)
+   set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} ";$ENV{QTDIR}/lib/cmake")
 endif ()
 
 find_package(Qt5Core REQUIRED)
diff --git a/mix/CodeEditorExtensionMan.cpp b/mix/CodeEditorExtensionMan.cpp
index d1ad6c075..6e2c72c7f 100644
--- a/mix/CodeEditorExtensionMan.cpp
+++ b/mix/CodeEditorExtensionMan.cpp
@@ -38,6 +38,13 @@ CodeEditorExtensionManager::CodeEditorExtensionManager()
 {    
 }
 
+CodeEditorExtensionManager::~CodeEditorExtensionManager()
+{
+    for (int k = 0; k < m_features.length(); k++){
+        delete m_features.at(k);
+    }
+}
+
 void CodeEditorExtensionManager::loadEditor(QQuickItem* _editor)
 {
     if (!_editor)
@@ -61,10 +68,11 @@ void CodeEditorExtensionManager::initExtensions()
 {
     try{
         //only one for now
-        ConstantCompilation* compil = new ConstantCompilation(m_doc);
-        if (compil->tabUrl() != "")
-            compil->addContentOn(m_tabView);
-        compil->start();
+        ConstantCompilation* m_constantCompilation = new ConstantCompilation(m_doc);
+        if (m_constantCompilation->tabUrl() != "")
+            m_constantCompilation->addContentOn(m_tabView);
+        m_constantCompilation->start();
+        m_features.append(m_constantCompilation);
     }
     catch (dev::Exception const& exception){
         qDebug() << "unable to load extensions: ";
diff --git a/mix/CodeEditorExtensionMan.h b/mix/CodeEditorExtensionMan.h
index 32f435338..306392254 100644
--- a/mix/CodeEditorExtensionMan.h
+++ b/mix/CodeEditorExtensionMan.h
@@ -20,11 +20,12 @@
  * Ethereum IDE client.
  */
 
-#ifndef CODEEDITOREXTENSIONMANAGER_H
-#define CODEEDITOREXTENSIONMANAGER_H
+#ifndef CODEEDITOREXTENSIONMAN_H
+#define CODEEDITOREXTENSIONMAN_H
 
 #include <QQuickItem>
 #include <QTextDocument>
+#include <QVector>
 #include "Feature.h"
 
 class CodeEditorExtensionManager : public QObject
@@ -36,15 +37,17 @@ class CodeEditorExtensionManager : public QObject
 
 public:
     CodeEditorExtensionManager();
+    ~CodeEditorExtensionManager();
     void initExtensions();
     void setEditor(QQuickItem*);
     void setTabView(QQuickItem*);
 
 private:
     QQuickItem* m_editor;
+    QVector<Feature*> m_features;
     QQuickItem* m_tabView;
     QTextDocument* m_doc;
     void loadEditor(QQuickItem*);
 };
 
-#endif // CODEEDITOREXTENSIONMANAGER_H
+#endif // CODEEDITOREXTENSIONMAN_H
diff --git a/mix/ConstantCompilation.cpp b/mix/ConstantCompilation.cpp
index 72e7b2bfe..3ed687177 100644
--- a/mix/ConstantCompilation.cpp
+++ b/mix/ConstantCompilation.cpp
@@ -40,18 +40,19 @@ ConstantCompilation::ConstantCompilation(QTextDocument* _doc)
     m_editor = _doc;
 }
 
-QString ConstantCompilation::tabUrl(){
+QString ConstantCompilation::tabUrl()
+{
     return QStringLiteral("qrc:/qml/BasicContent.qml");
 }
 
-void ConstantCompilation::start()
+QString ConstantCompilation::title()
 {
-    connect(m_editor, SIGNAL(contentsChange(int,int,int)), this, SLOT(compile()));
+    return "compiler";
 }
 
-QString ConstantCompilation::title()
+void ConstantCompilation::start()
 {
-    return "compiler";
+    connect(m_editor, SIGNAL(contentsChange(int,int,int)), this, SLOT(compile()));
 }
 
 void ConstantCompilation::compile()
diff --git a/mix/ConstantCompilation.h b/mix/ConstantCompilation.h
index ed99c6a5f..974277d2a 100644
--- a/mix/ConstantCompilation.h
+++ b/mix/ConstantCompilation.h
@@ -32,9 +32,9 @@ class ConstantCompilation : public Feature
 
 public:
     ConstantCompilation(QTextDocument* doc);
-    void start();
-    QString title();
-    QString tabUrl();
+    void start() override;
+    QString title() override;
+    QString tabUrl() override;
 
 private:
     QTextDocument* m_editor;
diff --git a/mix/Feature.cpp b/mix/Feature.cpp
index 309cf7eff..747b538d8 100644
--- a/mix/Feature.cpp
+++ b/mix/Feature.cpp
@@ -47,7 +47,6 @@ void Feature::addContentOn(QObject* tabView) {
                                 Q_ARG(QVariant, QVariant::fromValue(component)));
 
         m_view = qvariant_cast<QObject*>(returnValue);
-
     }
     catch (dev::Exception const& exception){
         qDebug() << exception.what();
diff --git a/mix/Feature.h b/mix/Feature.h
index 7a53f3a44..d5cee7e74 100644
--- a/mix/Feature.h
+++ b/mix/Feature.h
@@ -34,6 +34,7 @@ public:
     Feature();
     virtual QString tabUrl() { return ""; }
     virtual QString title() { return ""; }
+    virtual void start() {}
     void addContentOn(QObject* tabView);
 
 protected: