diff --git a/src/ariel-os-embassy-common/src/lib.rs b/src/ariel-os-embassy-common/src/lib.rs
index 4659da7c4..cc896925e 100644
--- a/src/ariel-os-embassy-common/src/lib.rs
+++ b/src/ariel-os-embassy-common/src/lib.rs
@@ -2,6 +2,10 @@
 
 #![no_std]
 #![feature(doc_auto_cfg)]
+#![cfg_attr(
+    context = "xtensa",
+    expect(stable_features, reason = "Xtensa toolchain held behind")
+)]
 #![deny(clippy::pedantic)]
 #![deny(missing_docs)]