diff --git a/README.md b/README.md
index a5dec42..09b715b 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,7 @@ are only interested in one. It's easier than it looks, and doing all families at
 - Cleanup the register yamls (see below).
 - Minimize the diff between each pair of versions. For example between `lpuart_v1.yaml` and `lpuart_v2.yaml`. If one is missing enums or descriptions, copy it from another.
 - Make sure the block
-- Add entries to [`perimap`](https://github.com/embassy-rs/stm32-data/blob/main/stm32data/__main__.py#L84), see below.
+- Add entries to [`perimap`](https://github.com/embassy-rs/stm32-data/blob/main/stm32-data-gen/src/chips.rs#L109), see below.
 - Regen, check `data/chips/*.yaml` has the right `block: lpuart_vX/LPUART` fields
 
 Please separate manual changes and changes resulting from regen in separate commits. It helps tremendously with review and rebasing/merging.