diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index e5c12d9efd53b871b740800c212a15721d7e17f3..d12da67e318e37e9aff2d7eda14e1782ad6360c5 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,7 +1,7 @@
 [toolchain]
 channel = "1.93"
 profile = "minimal"
-components = [ "rustfmt", "clippy", "rust-analyzer" ]
+components = [ "rustfmt", "clippy", "rust-analyzer", "rust-src" ]
 targets = [
     "wasm32-wasip2", # extensions
     "x86_64-unknown-linux-musl", # remote server