diff --git a/docs/reference/00-index.md b/docs/reference/00-index.md
index ae9f131..a77a167 100644
--- a/docs/reference/00-index.md
+++ b/docs/reference/00-index.md
@@ -24,7 +24,7 @@ Each document cites its source manual and marks claims as documented,
 
 Related:
 - [Barcode scanner API](../inventory/SCANNER-API.md) — the `WL2`/Symbol2 laser scanner (reverse-engineered).
-- [RE toolchain & plan](toolchain-and-plan.md) — how the emulator/disassembler RE was done and the roadmap.
+- [RE toolchain & plan](../mx-re/toolchain-and-plan.md) — how the emulator/disassembler RE was done and the roadmap.
 
 ## Status