diff --git a/blog/content/edition-2/posts/02-minimal-rust-kernel/index.md b/blog/content/edition-2/posts/02-minimal-rust-kernel/index.md
index 7567da92..c4cf302c 100644
--- a/blog/content/edition-2/posts/02-minimal-rust-kernel/index.md
+++ b/blog/content/edition-2/posts/02-minimal-rust-kernel/index.md
@@ -306,6 +306,7 @@ Fortunately, the `compiler_builtins` crate already contains implementations for
 
 [unstable]
 build-std-features = ["compiler-builtins-mem"]
+build-std = ["core", "compiler_builtins"]
 ```
 
 (Support for the `compiler-builtins-mem` feature was only [added very recently](https://github.com/rust-lang/rust/pull/77284), so you need at least Rust nightly `2020-09-30` for it.)