diff --git a/src/common/ml_shared_data_context.h b/src/common/ml_shared_data_context.h
index 8755bae8e..664ed29b2 100644
--- a/src/common/ml_shared_data_context.h
+++ b/src/common/ml_shared_data_context.h
@@ -250,7 +250,7 @@ class MLSceneGLSharedDataContext : public QGLWidget
 public:
 	//parent is set to NULL in order to avoid QT bug on MAC (business as usual...).
 	//The QGLWidget are destroyed by hand in the MainWindow destructor...
-	MLSceneGLSharedDataContext(MeshDocument& md, vcg::QtThreadSafeMemoryInfo& gpumeminfo, bool highprecision, size_t perbatchtriangles, size_t minfacespersmoothrendering);
+	MLSceneGLSharedDataContext(MeshDocument& md, vcg::QtThreadSafeMemoryInfo& gpumeminfo, bool highprecision, size_t perbatchtriangles, size_t minfacespersmoothrendering = 0);
 
 	~MLSceneGLSharedDataContext();
 
diff --git a/src/meshlabserver/mainserver.cpp b/src/meshlabserver/mainserver.cpp
index 5e19bc20c..fd4d03cd6 100644
--- a/src/meshlabserver/mainserver.cpp
+++ b/src/meshlabserver/mainserver.cpp
@@ -653,7 +653,7 @@ int main(int argc, char *argv[])
 
 	MeshDocument meshDocument;
 
-	MLSceneGLSharedDataContext shared(meshDocument, gpumeminfo, MeshLabScalarTest<MESHLAB_SCALAR>::doublePrecision(), 100000, 50000);
+	MLSceneGLSharedDataContext shared(meshDocument, gpumeminfo, MeshLabScalarTest<MESHLAB_SCALAR>::doublePrecision(), 100000);
 	shared.makeCurrent();
 	GLenum err = glewInit();
 	if (err != GLEW_NO_ERROR)