diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index a24afec2..9667a009 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,4 +1,4 @@
 [toolchain]
 channel = "nightly-2022-04-10"
-components = ["llvm-tools-preview", "rustfmt"]
+components = ["rust-src", "llvm-tools-preview", "rustfmt"]
 targets = ["aarch64-unknown-none-softfloat"]