diff --git a/common/protob/messages-ethereum.proto b/common/protob/messages-ethereum.proto
index abc699010..59dfae175 100644
--- a/common/protob/messages-ethereum.proto
+++ b/common/protob/messages-ethereum.proto
@@ -44,7 +44,8 @@ message EthereumGetAddress {
  * @end
  */
 message EthereumAddress {
-    optional string address = 2;     // Ethereum address as string
+    optional bytes old_address = 1 [deprecated=true];  // trezor <1.8.0, <2.1.0 - raw bytes of Ethereum address
+    optional string address = 2;                       // Ethereum address as hex-encoded string
 }
 
 /**