diff --git a/typescript/observer/ballot_pb.d.ts b/typescript/observer/ballot_pb.d.ts
index 100a1a0f1d..1eb7d2f01d 100644
--- a/typescript/observer/ballot_pb.d.ts
+++ b/typescript/observer/ballot_pb.d.ts
@@ -50,6 +50,8 @@ export declare enum BallotStatus {
 }
 
 /**
+ * https://github.com/zeta-chain/node/issues/939
+ *
  * @generated from message zetachain.zetacore.observer.Ballot
  */
 export declare class Ballot extends Message<Ballot> {
diff --git a/x/observer/types/ballot.go b/x/observer/types/ballot.go
index c7ef8f3836..060f6a2475 100644
--- a/x/observer/types/ballot.go
+++ b/x/observer/types/ballot.go
@@ -3,6 +3,7 @@ package types
 import (
 	"fmt"
 
+	"cosmossdk.io/errors"
 	cosmoserrors "cosmossdk.io/errors"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
diff --git a/x/observer/types/ballot.pb.go b/x/observer/types/ballot.pb.go
index 7e8c40afeb..8e9313d1dd 100644
--- a/x/observer/types/ballot.pb.go
+++ b/x/observer/types/ballot.pb.go
@@ -81,6 +81,7 @@ func (BallotStatus) EnumDescriptor() ([]byte, []int) {
 	return fileDescriptor_9eac86b249c97b5b, []int{1}
 }
 
+// https://github.com/zeta-chain/node/issues/939
 type Ballot struct {
 	Index                string                                 `protobuf:"bytes,1,opt,name=index,proto3" json:"index,omitempty"`
 	BallotIdentifier     string                                 `protobuf:"bytes,2,opt,name=ballot_identifier,json=ballotIdentifier,proto3" json:"ballot_identifier,omitempty"`