diff --git a/libethereum/Transaction.h b/libethereum/Transaction.h
index 85543a3fc..8cb6cb7fc 100644
--- a/libethereum/Transaction.h
+++ b/libethereum/Transaction.h
@@ -66,7 +66,7 @@ enum class CodeDeposit
 	Success
 };
 
-class VMException;
+struct VMException;
 
 TransactionException toTransactionException(VMException const& _e);