diff --git a/README.md b/README.md
index ace7b9c..a9e667b 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,8 @@ https://erp12.github.io/pyshgp/html/core_instructions.html
 
 I'm not going to include no-ops.
 
+Interpush doesn't have the code stack. Time to test this against pysh.
+
 ## Tasks
 * [ ] Post minimal core of exec to haskell discourse for advice about speed optimization.
 * [x] Do test-driven development on this one.