diff --git a/qglview/glvbo.cpp b/qglview/glvbo.cpp
index 74f4a8d..87edfeb 100644
--- a/qglview/glvbo.cpp
+++ b/qglview/glvbo.cpp
@@ -231,7 +231,7 @@ void GLVBO::translatePoints(const QVector3D & dp) {
 		vertices_[vi + 1] += dp.y();
 		vertices_[vi + 2] += dp.z();
 	}
-	rebuffer();
+	changed = true;
 }
 
 
@@ -244,7 +244,7 @@ void GLVBO::scalePoints(const QVector3D & dp) {
 		vertices_[vi + 1] *= dp.y();
 		vertices_[vi + 2] *= dp.z();
 	}
-	rebuffer();
+	changed = true;
 }