diff --git a/gtk2_ardour/canvas_vars.h b/gtk2_ardour/canvas_vars.h
index 3bcbd7d8fa..2eaf42a304 100644
--- a/gtk2_ardour/canvas_vars.h
+++ b/gtk2_ardour/canvas_vars.h
@@ -132,6 +132,8 @@ CANVAS_VARIABLE(canvasvar_RecordingRect, "recording rect")
 CANVAS_VARIABLE(canvasvar_RecWaveFormFill, "recorded waveform fill")
 CANVAS_VARIABLE(canvasvar_RecWaveForm, "recorded waveform outline")
 CANVAS_VARIABLE(canvasvar_RubberBandRect, "rubber band rect")
+CANVAS_VARIABLE(canvasvar_RulerBase, "ruler base")
+CANVAS_VARIABLE(canvasvar_RulerText, "ruler text")
 CANVAS_VARIABLE(canvasvar_SelectedCrossfadeEditorLine, "selected crossfade editor line")
 CANVAS_VARIABLE(canvasvar_SelectedCrossfadeEditorWave, "selected crossfade editor wave")
 CANVAS_VARIABLE(canvasvar_SelectedFrameBase, "selected region base")