diff --git a/qglview/qglview.cpp b/qglview/qglview.cpp
index d5160cf..a094d56 100644
--- a/qglview/qglview.cpp
+++ b/qglview/qglview.cpp
@@ -1,19 +1,19 @@
 /*
-    QGLView
-    Copyright (C) 2018  Ivan Pelipenko peri4ko@yandex.ru
+	QGLView
+	Copyright (C) 2018  Ivan Pelipenko peri4ko@yandex.ru
 
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
 
-    This program 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 General Public License for more details.
+	This program 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 General Public License for more details.
 
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "qglview.h"
@@ -28,6 +28,7 @@ QGLView::QGLView(QWidget * parent): QGraphicsView(parent), fbo_selection(3) {
 	setScene(new QGraphicsScene());
 	setInteractive(true);
 	_w = 0;
+	timer = 0;
 	need_init_ = is_first_draw = true;
 	objects_.is_root = true;
 	objects_.view_ = this;
@@ -365,7 +366,7 @@ void QGLView::paintGL() {
 			glDrawQuad();
 		}
 	}
-	
+
 	if (selecting_ && painter_) {
 		painter_->setPen(sel_pen);
 		painter_->setBrush(sel_brush);
@@ -631,7 +632,7 @@ void QGLView::mouseMoveEvent(QMouseEvent * e) {
 	QGraphicsView::mouseMoveEvent(e);
 	//lastPos = e->pos();
 	if (selecting_) {
-		
+
 		return;
 	}
 	if (!mouseThis_) return;
diff --git a/qglview/qglview.h b/qglview/qglview.h
index f29f9d9..67bbd6e 100644
--- a/qglview/qglview.h
+++ b/qglview/qglview.h
@@ -1,19 +1,19 @@
 /*
-    QGLView
-    Copyright (C) 2018  Ivan Pelipenko peri4ko@yandex.ru
+	QGLView
+	Copyright (C) 2018  Ivan Pelipenko peri4ko@yandex.ru
 
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
 
-    This program 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 General Public License for more details.
+	This program 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 General Public License for more details.
 
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #ifndef QGLVIEW_H
@@ -109,13 +109,13 @@ public:
 		qglDepthOfFieldFocus,
 		qglDepthOfFieldDiaphragm
 	};
-	
+
 	Q_ENUMS (FogMode)
 	Q_ENUMS (SelectionMode)
 	//enum LightingMode {Simple, PerPixel, DeferredShading};
 	//Q_ENUMS (LightingMode)
 
-	void stop() {killTimer(timer);}
+	void stop() {if (timer) killTimer(timer);}
 	void start(double freq = 40.) {timer = startTimer(freq <= 0. ? 0 : 1000. / freq);}
 
 	GLRendererBase * renderer() {return renderer_;}