diff --git a/cli/assets/templates/rust/src/lib.rs b/cli/assets/templates/rust/src/lib.rs
index d1c7f303..8bcd496b 100644
--- a/cli/assets/templates/rust/src/lib.rs
+++ b/cli/assets/templates/rust/src/lib.rs
@@ -1,3 +1,4 @@
+#![no_std]
 #[cfg(feature = "buddy-alloc")]
 mod alloc;
 mod wasm4;
diff --git a/cli/assets/templates/rust/src/wasm4.rs b/cli/assets/templates/rust/src/wasm4.rs
index 7f04e61c..2af2f0f8 100644
--- a/cli/assets/templates/rust/src/wasm4.rs
+++ b/cli/assets/templates/rust/src/wasm4.rs
@@ -225,3 +225,8 @@ extern "C" {
     #[link_name = "traceUtf8"]
     fn extern_trace(trace: *const u8, length: usize);
 }
+
+#[panic_handler]
+fn panic(_info: &core::panic::PanicInfo) -> ! {
+    core::arch::wasm32::unreachable();
+}
\ No newline at end of file