diff --git a/libs/canvas/wscript b/libs/canvas/wscript
index b69020e52a..4d6e13a3ad 100644
--- a/libs/canvas/wscript
+++ b/libs/canvas/wscript
@@ -44,6 +44,7 @@ canvas_sources = [
         'poly_line.cc',
         'polygon.cc',
         'rectangle.cc',
+        'rect_set.cc',
         'root_group.cc',
         'ruler.cc',
         'scroll_group.cc',