diff --git a/proto/src/main/proto/pb.proto b/proto/src/main/proto/pb.proto
index cee43067..9f967b45 100644
--- a/proto/src/main/proto/pb.proto
+++ b/proto/src/main/proto/pb.proto
@@ -642,7 +642,7 @@ message OfferPayload {
 }
 
 enum OfferDirection {
-    OFFER_DIRECTION_ERROR = 0;
+    OFFER_DIRECTION_UNDEFINED = 0;
     BUY = 1;
     SELL = 2;
 }