diff --git a/stylus-proc/src/macros/derive/solidity_error/mod.rs b/stylus-proc/src/macros/derive/solidity_error/mod.rs
index e1465966..e97948a0 100644
--- a/stylus-proc/src/macros/derive/solidity_error/mod.rs
+++ b/stylus-proc/src/macros/derive/solidity_error/mod.rs
@@ -70,6 +70,17 @@ impl DeriveSolidityError {
             }
         }
     }
+
+    fn method_error_impl(&self) -> syn::ItemImpl {
+        let name = &self.name;
+        parse_quote! {
+            impl stylus_sdk::stylus_core::errors::MethodError for #name {
+                fn encode(self) -> alloc::vec::Vec<u8> {
+                    self.into()
+                }
+            }
+        }
+    }
 }
 
 impl From<&syn::ItemEnum> for DeriveSolidityError {
@@ -101,6 +112,7 @@ impl ToTokens for DeriveSolidityError {
             from_impl.to_tokens(tokens);
         }
         self.vec_u8_from_impl().to_tokens(tokens);
+        self.method_error_impl().to_tokens(tokens);
         Extension::codegen(self).to_tokens(tokens);
     }
 }
@@ -160,5 +172,13 @@ mod tests {
                 }
             },
         );
+        assert_ast_eq(
+            derived.method_error_impl(),
+            parse_quote!{
+                impl stylus_sdk::stylus_core::errors::MethodError for MyError {
+                    fn encode(self) -> alloc::vec::Vec<u8> { self.into() }
+                }
+            }
+        )
     }
 }