diff --git a/third_party/proto/confio/proofs.proto b/third_party/proto/confio/proofs.proto
index 9dd39e614d..da43503ecb 100644
--- a/third_party/proto/confio/proofs.proto
+++ b/third_party/proto/confio/proofs.proto
@@ -1,6 +1,7 @@
 syntax = "proto3";
 
 package ics23;
+option go_package = "github.com/confio/ics23/go";
 
 enum HashOp {
     // NO_HASH is the default if no data passed. Note this is an illegal argument some places.