diff --git a/examples/program_deployment/methods/guest/src/bin/simple_tail_call.rs b/examples/program_deployment/methods/guest/src/bin/simple_tail_call.rs
index cc7f429..d0dac57 100644
--- a/examples/program_deployment/methods/guest/src/bin/simple_tail_call.rs
+++ b/examples/program_deployment/methods/guest/src/bin/simple_tail_call.rs
@@ -9,6 +9,11 @@ use nssa_core::program::{
 // It reads a single account, emits it unchanged, and then triggers a tail call
 // to the Hello World program with a fixed greeting.
 
+
+/// This needs to be set to the ID of the Hello world program.
+/// To get the ID run **from the root directoy of the repository**:
+/// `cargo risczero build --manifest-path examples/program_deployment/methods/guest/Cargo.toml`
+/// This compiles the programs and outputs the IDs in hex that can be used to copy here.
 const HELLO_WORLD_PROGRAM_ID_HEX: &str =
     "e9dfc5a5d03c9afa732adae6e0edfce4bbb44c7a2afb9f148f4309917eb2de6f";