diff --git a/starkjs/README.md b/starkjs/README.md
index a0d59234..41a13530 100644
--- a/starkjs/README.md
+++ b/starkjs/README.md
@@ -2,6 +2,8 @@
 
 PIL compiler and Circom transpiler. The stark prover is [starky](../starky).
 
+Note: since `powdr` syntax has been imcompatible with original `pil`, the scripts is no longer supported, the breaking changes happens at issue #271.
+
 ## Run Example
 ### Arithmetization: Constraint Polynomial