diff --git a/example/CMakeLists.txt b/example/CMakeLists.txt
index 736d386..5eedac8 100644
--- a/example/CMakeLists.txt
+++ b/example/CMakeLists.txt
@@ -11,7 +11,7 @@ endif()
 
 project( example LANGUAGES CXX )
 
-set( unit_name "optional" )
+# unit_name provided by toplevel CMakeLists.txt
 set( PACKAGE   ${unit_name}-bare )
 set( PROGRAM   ${unit_name}-bare )