diff --git a/docs/src/rustc-hacks.md b/docs/src/rustc-hacks.md
index c7b5b31a191a1..e5735fe73461d 100644
--- a/docs/src/rustc-hacks.md
+++ b/docs/src/rustc-hacks.md
@@ -15,7 +15,7 @@ In order to get these features working for `rustc` crates, you can do the follow
 
 Add the following to the `rust-analyzer` extension settings in `settings.json`:
 ```json
-    "rust-analyzer.rustcSource": "discover",
+    "rust-analyzer.rustc.source": "discover",
     "rust-analyzer.workspace.symbol.search.scope": "workspace_and_dependencies",
 ```