diff --git a/soroban-sdk/src/lib.rs b/soroban-sdk/src/lib.rs
index 95207d7a..0a3d4387 100644
--- a/soroban-sdk/src/lib.rs
+++ b/soroban-sdk/src/lib.rs
@@ -47,6 +47,12 @@
 #[cfg(all(target_family = "wasm", feature = "testutils"))]
 compile_error!("'testutils' feature is not supported on 'wasm' target");
 
+#[cfg(all(target_family = "wasm", target_feature = "reference-types"))]
+compile_error!("Compiler configuration is unsupported by Soroban Environment, because a Wasm target-feature is enabled that is not yet supported: reference-types. Use Rust 1.81 or older to get a compatible default configuration.");
+
+#[cfg(all(target_family = "wasm", target_feature = "multivalue"))]
+compile_error!("Compiler configuration is unsupported by Soroban Environment, because a Wasm target-feature is enabled that is not yet supported: multivalue. Use Rust 1.81 or older to get a compatible default configuration.");
+
 // When used in a no_std contract, provide a panic handler as one is required.
 #[cfg(all(not(feature = "alloc"), target_family = "wasm"))]
 #[panic_handler]