diff --git a/core/sr-io/src/lib.rs b/core/sr-io/src/lib.rs
index 12e09945d2704..e239b99f0a9c4 100644
--- a/core/sr-io/src/lib.rs
+++ b/core/sr-io/src/lib.rs
@@ -18,6 +18,7 @@
 //! This is part of the Substrate runtime.
 // end::description[]
 
+#![cfg_attr(not(feature = "std"), feature(panic_handler))]
 #![cfg_attr(not(feature = "std"), no_std)]
 #![cfg_attr(not(feature = "std"), feature(lang_items))]
 #![cfg_attr(not(feature = "std"), feature(alloc_error_handler))]