diff --git a/TODO b/TODO
index 2dbe878..efddbf5 100644
--- a/TODO
+++ b/TODO
@@ -2,5 +2,4 @@
 - Implement light multi-sampling (mainly for skydome).
 - Implement scaling and scrolling on previews.
 - Water and terrain LOD moves with the camera, fix it like in the wanderer.
-- Find the random segfault at start (in PreviewTerrainColor::getColor).
 - Restore render progress.
diff --git a/gui_qt/baseform.cpp b/gui_qt/baseform.cpp
index 9dc8e57..bfb3b20 100644
--- a/gui_qt/baseform.cpp
+++ b/gui_qt/baseform.cpp
@@ -151,7 +151,8 @@ void BaseForm::addPreview(Preview* preview, QString label)
 {
     previews->layout()->addWidget(new QLabel(label, previews));
     previews->layout()->addWidget(preview);
-
+    
+    preview->start();
     preview->setObjectName("_form_preview_");
 }
 
diff --git a/gui_qt/dialognoise.cpp b/gui_qt/dialognoise.cpp
index 3903f97..e510f94 100644
--- a/gui_qt/dialognoise.cpp
+++ b/gui_qt/dialognoise.cpp
@@ -98,10 +98,12 @@ DialogNoise::DialogNoise(QWidget *parent, NoiseGenerator* value):
     previews->layout()->addWidget(new QLabel("Level preview"));
     previews->layout()->addWidget(previewLevel);
     previewLevel->setScaling(1.0 / 127.0);
+    previewLevel->start();
     previewTotal = new PreviewTotal(previews, _current);
     previews->layout()->addWidget(new QLabel("Total preview"));
     previews->layout()->addWidget(previewTotal);
     previewTotal->setScaling(1.0 / 127.0);
+    previewTotal->start();
 
     form = new QWidget(this);
     form->setLayout(new QVBoxLayout());
diff --git a/gui_qt/preview.cpp b/gui_qt/preview.cpp
index e8d5672..26e004e 100644
--- a/gui_qt/preview.cpp
+++ b/gui_qt/preview.cpp
@@ -61,7 +61,6 @@ Preview::Preview(QWidget* parent) :
     QObject::connect(this, SIGNAL(redrawRequested()), this, SLOT(handleRedraw()));
 
     this->updater = new PreviewDrawer(this);
-    this->updater->start();
 }
 
 Preview::~Preview()
@@ -73,7 +72,8 @@ Preview::~Preview()
 
     delete updater;
     delete pixbuf;
-    delete lock_drawing;;}
+    delete lock_drawing;
+}
 
 void Preview::updateData()
 {
@@ -84,6 +84,11 @@ QColor Preview::getColor(double x, double y)
     return QColor(0, 0, 0);
 }
 
+void Preview::start()
+{
+    this->updater->start();
+}
+
 void Preview::doRender()
 {
     if (this->alive)
diff --git a/gui_qt/preview.h b/gui_qt/preview.h
index 2bb1385..6bc8f38 100644
--- a/gui_qt/preview.h
+++ b/gui_qt/preview.h
@@ -14,6 +14,7 @@ public:
     Preview(QWidget* parent);
     ~Preview();
 
+    void start();
     void doRender();
     void redraw();
 
@@ -30,7 +31,6 @@ protected:
 private:
     void forceRender();
     void renderPixbuf();
-    static void startUpdater();
 
     void resizeEvent(QResizeEvent* event);
     void paintEvent(QPaintEvent* event);