diff --git a/src/mesh_viewer.cpp b/src/mesh_viewer.cpp
index 66c3b9c..e705e15 100644
--- a/src/mesh_viewer.cpp
+++ b/src/mesh_viewer.cpp
@@ -42,6 +42,11 @@ MeshViewer::MeshViewer(QWidget *parent) : QOpenGLWidget(parent) {
 }
 
 
+QSize MeshViewer::sizeHint() const {
+	return QSize(640, 480);
+}
+
+
 void GLAPIENTRY
 opengl_debug_cb(GLenum source,
 				GLenum type,
diff --git a/src/mesh_viewer.h b/src/mesh_viewer.h
index f8db306..55355c8 100644
--- a/src/mesh_viewer.h
+++ b/src/mesh_viewer.h
@@ -33,6 +33,7 @@ class MeshViewer : public QOpenGLWidget {
 
 public:
     MeshViewer(QWidget *parent=nullptr);
+	virtual QSize sizeHint() const override;
     void initializeGL() override;
     void resizeGL(int w, int h) override;
     void paintGL() override;