diff --git a/panels/extrude.py b/panels/extrude.py
index 2a5173d8..fff9efdc 100644
--- a/panels/extrude.py
+++ b/panels/extrude.py
@@ -49,7 +49,8 @@ class ExtrudePanel(ScreenPanel):
         i = 0
         for extruder in self._printer.get_tools():
             if self._printer.extrudercount > 1:
-                self.labels[extruder] = self._gtk.ButtonImage("extruder-%s" % i, "")
+                self.labels[extruder] = self._gtk.ButtonImage("extruder-%s" % i,
+                                                              "T%s" % self._printer.get_tool_number(extruder))
             else:
                 self.labels[extruder] = self._gtk.ButtonImage("extruder", "")
             self.labels[extruder].connect("clicked", self.change_extruder, extruder)