diff --git a/go/chromite/api/firmware.pb.go b/go/chromite/api/firmware.pb.go
index a680b17..b526553 100644
--- a/go/chromite/api/firmware.pb.go
+++ b/go/chromite/api/firmware.pb.go
@@ -914,6 +914,8 @@
 	// The artifact types requested.  The firmware_location is found in
 	// artifacts.output_artifacts[].location.
 	Artifacts *chromiumos.ArtifactsByService_Firmware `protobuf:"bytes,4,opt,name=artifacts,proto3" json:"artifacts,omitempty"`
+	// The Chrome OS style version to use in FirmwareArtifactInfo.
+	BcsVersion string `protobuf:"bytes,5,opt,name=bcs_version,json=bcsVersion,proto3" json:"bcs_version,omitempty"`
 }
 
 func (x *BundleFirmwareArtifactsRequest) Reset() {
@@ -969,6 +971,13 @@
 	return nil
 }
 
+func (x *BundleFirmwareArtifactsRequest) GetBcsVersion() string {
+	if x != nil {
+		return x.BcsVersion
+	}
+	return ""
+}
+
 type BundleFirmwareArtifactsResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1252,7 +1261,7 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// The Chrome OS style version
+	// The Chrome OS style version.
 	BcsVersion string `protobuf:"bytes,1,opt,name=bcs_version,json=bcsVersion,proto3" json:"bcs_version,omitempty"`
 	// The name of the firmware image used by the firmware updater. Typically
 	// the device name, but can differ when a device may have two or more
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 }
 
 var (
diff --git a/src/chromite/api/firmware.proto b/src/chromite/api/firmware.proto
index 3155a3f..bfa243d 100644
--- a/src/chromite/api/firmware.proto
+++ b/src/chromite/api/firmware.proto
@@ -184,6 +184,9 @@
   // The artifact types requested.  The firmware_location is found in
   // artifacts.output_artifacts[].location.
   chromiumos.ArtifactsByService.Firmware artifacts = 4;
+
+  // The Chrome OS style version to use in FirmwareArtifactInfo.
+  string bcs_version = 5;
 }
 
 message BundleFirmwareArtifactsResponse {
@@ -196,7 +199,7 @@
   // TODO(crbug/1176305): Use types from
   // chromiumos/config/api/software/firmware_config.proto
   message TarballInfo {
-      // The Chrome OS style version
+      // The Chrome OS style version.
       string bcs_version = 1;
 
       // The name of the firmware image used by the firmware updater. Typically