diff --git a/libs/surfaces/push2/knob.cc b/libs/surfaces/push2/knob.cc
index 2e10545ca9..e898744d8c 100644
--- a/libs/surfaces/push2/knob.cc
+++ b/libs/surfaces/push2/knob.cc
@@ -85,7 +85,7 @@ Push2Knob::set_radius (double r)
 {
 	_r = r;
 
-	text->set_position (Duple (-_r, -_r - 20));
+	_text->set_position (Duple (-_r, -_r - 20));
 	set_bbox_dirty ();
 	redraw ();
 }