diff --git a/program.md b/program.md
index ac5cfeb78..45ff85197 100644
--- a/program.md
+++ b/program.md
@@ -1,4 +1,5 @@
 # program
 
 - a [[program]] is a [[composition]] of [[patterns]] and [[data structures]].
+  - a [[program]] is a [[composition]] of [[patterns]].