diff --git a/README.md b/README.md
index 7a08ebd..525a2d8 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
 simple-virtual-machine
 ======================
 
-A simple VM for a talk on building VMs
+A simple VM for a talk on building VMs.
+
+This branch supports function call/return.