diff --git a/bindings/rust/evmc-vm/src/lib.rs b/bindings/rust/evmc-vm/src/lib.rs
index 0180447..8d926a6 100644
--- a/bindings/rust/evmc-vm/src/lib.rs
+++ b/bindings/rust/evmc-vm/src/lib.rs
@@ -30,6 +30,7 @@ pub trait EvmcVm {
 }
 
 /// EVMC result structure.
+#[derive(Debug)]
 pub struct ExecutionResult {
     status_code: ffi::evmc_status_code,
     gas_left: i64,
@@ -38,6 +39,7 @@ pub struct ExecutionResult {
 }
 
 /// EVMC execution message structure.
+#[derive(Debug)]
 pub struct ExecutionMessage {
     kind: ffi::evmc_call_kind,
     flags: u32,