diff --git a/modules/highgui/include/opencv2/highgui/highgui_c.h b/modules/highgui/include/opencv2/highgui/highgui_c.h
index 4c4c35e04..4d290dccc 100644
--- a/modules/highgui/include/opencv2/highgui/highgui_c.h
+++ b/modules/highgui/include/opencv2/highgui/highgui_c.h
@@ -74,7 +74,7 @@ enum {	CV_STYLE_NORMAL			= 0,//QFont::StyleNormal,
 
 //for color cvScalar(blue_component, green_component, red\_component[, alpha_component])
 //and alpha= 0 <-> 0xFF (not transparent <-> transparent)
-CVAPI(CvFont) cvFont_Qt(const char* nameFont, int pointSize CV_DEFAULT(-1), CvScalar color = cvScalarAll(0), int weight CV_DEFAULT(CV_FONT_NORMAL),  int style CV_DEFAULT(CV_STYLE_NORMAL), int spacing CV_DEFAULT(0));
+CVAPI(CvFont) cvFont_Qt(const char* nameFont, int pointSize CV_DEFAULT(-1), CvScalar color CV_DEFAULT(cvScalarAll(0)), int weight CV_DEFAULT(CV_FONT_NORMAL),  int style CV_DEFAULT(CV_STYLE_NORMAL), int spacing CV_DEFAULT(0));
 
 CVAPI(void) cvAddText( CvArr* img, const char* text, CvPoint org, CvFont *arg2);
 
diff --git a/modules/highgui/src/window_QT.cpp b/modules/highgui/src/window_QT.cpp
index 770aea694..a43af2ecd 100755
--- a/modules/highgui/src/window_QT.cpp
+++ b/modules/highgui/src/window_QT.cpp
@@ -1654,14 +1654,14 @@ void ViewPort::paintEvent(QPaintEvent* event)
 #if defined(OPENCV_GL)
     if ( mode_display == CV_MODE_OPENGL && on_openGL_draw3D)
     {
-	myPainter.beginNativePainting();
+	//myPainter.beginNativePainting();
 
 	setGL(width(),height());
 	on_openGL_draw3D(on_openGL_param);
 	//draw3D();
 	unsetGL();
 	
-	myPainter.endNativePainting();
+	//myPainter.endNativePainting();
     }
 #endif