diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2b43ecfc01dd..d03919740051 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+### Bug Fixes
+
+* (grpc) [\#10985](https://github.com/cosmos/cosmos-sdk/pull/10992) The `/cosmos/tx/v1beta1/txs/{hash}` endpoint returns a 404 when a tx does not exist.
+
 ## [v0.45.0](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.45.0) - 2022-01-18
 
 ### State Machine Breaking
diff --git a/x/auth/tx/service.go b/x/auth/tx/service.go
index b9633990d7ee..d95690cf108b 100644
--- a/x/auth/tx/service.go
+++ b/x/auth/tx/service.go
@@ -115,6 +115,8 @@ func (s txServer) GetTx(ctx context.Context, req *txtypes.GetTxRequest) (*txtype
 		return nil, status.Error(codes.InvalidArgument, "tx hash cannot be empty")
 	}
 
+	// TODO We should also check the proof flag in gRPC header.
+	// https://github.com/cosmos/cosmos-sdk/issues/7036.
 	result, err := QueryTx(s.clientCtx, req.Hash)
 	if err != nil {
 		if strings.Contains(err.Error(), "not found") {