diff --git a/apps/sample/sample.pro b/apps/sample/sample.pro
index 8fb74857..42da3bca 100644
--- a/apps/sample/sample.pro
+++ b/apps/sample/sample.pro
@@ -10,6 +10,7 @@ SUBDIRS       = trimesh_base \
                 trimesh_isosurface \
                 trimesh_join \
                 trimesh_optional \
+                trimesh_intersection \
                 aabb_binary_tree