diff --git a/libs/canvas/wscript b/libs/canvas/wscript
index 0e949aee07..b258c79e40 100644
--- a/libs/canvas/wscript
+++ b/libs/canvas/wscript
@@ -60,6 +60,7 @@ canvas_sources = [
         'ruler.cc',
         'scroll_group.cc',
         'stateful_image.cc',
+        'step_button.cc',
         'text.cc',
         'tracking_text.cc',
         'types.cc',