diff --git a/projects/sample/Makefile b/projects/sample/Makefile
index c1a894b..f96f1ab 100644
--- a/projects/sample/Makefile
+++ b/projects/sample/Makefile
@@ -8,11 +8,8 @@
 # Indicates our relative path to the top of the project's root directory.
 #
 LEVEL = .
-
-#
-# Directories that needs to be built.
-#
 DIRS = lib tools
+EXTRA_DIST = include
 
 #
 # Include the Master Makefile that knows how to build all.