diff --git a/crates/roc_std/src/lib.rs b/crates/roc_std/src/lib.rs
index 7a4953e508..2b5fbd4aa4 100644
--- a/crates/roc_std/src/lib.rs
+++ b/crates/roc_std/src/lib.rs
@@ -1,5 +1,5 @@
 //! Provides Rust representations of Roc data structures.
-#![no_std]
+#![cfg_attr(not(feature = "std"), no_std)]
 #![crate_type = "lib"]
 
 use arrayvec::ArrayString;
diff --git a/crates/roc_std/src/roc_str.rs b/crates/roc_std/src/roc_str.rs
index 1fefb2c228..57cfc549a8 100644
--- a/crates/roc_std/src/roc_str.rs
+++ b/crates/roc_std/src/roc_str.rs
@@ -18,7 +18,7 @@ use core::{
 };
 
 #[cfg(feature = "std")]
-use core::ffi::{CStr, CString};
+use std::ffi::{CStr, CString};
 
 use crate::RocList;