diff --git a/apps/sample/sample.pro b/apps/sample/sample.pro
index b317cf78..335bc49f 100644
--- a/apps/sample/sample.pro
+++ b/apps/sample/sample.pro
@@ -14,6 +14,7 @@ SUBDIRS       = trimesh_base  \
                 trimesh_intersection \
                 trimesh_ball_pivoting \
                 trimesh_hole \
+                polygonmesh_base \
                 aabb_binary_tree \
                 edgemesh_grid \
 		    trimesh_attribute