diff --git a/packages/google-cloud-asset/src/v1/asset_service_client.ts b/packages/google-cloud-asset/src/v1/asset_service_client.ts
index 9c7ebb91590..8db426c5c26 100644
--- a/packages/google-cloud-asset/src/v1/asset_service_client.ts
+++ b/packages/google-cloud-asset/src/v1/asset_service_client.ts
@@ -142,6 +142,8 @@ export class AssetServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-asset/src/v1/asset_service_proto_list.json b/packages/google-cloud-asset/src/v1/asset_service_proto_list.json
index 37185e2cc13..d519d6bffd1 100644
--- a/packages/google-cloud-asset/src/v1/asset_service_proto_list.json
+++ b/packages/google-cloud-asset/src/v1/asset_service_proto_list.json
@@ -1,4 +1,10 @@
 [
   "../../protos/google/cloud/asset/v1/asset_service.proto",
-  "../../protos/google/cloud/asset/v1/assets.proto"
+  "../../protos/google/cloud/asset/v1/assets.proto",
+  "../../protos/google/cloud/orgpolicy/v1/orgpolicy.proto",
+  "../../protos/google/cloud/osconfig/v1/inventory.proto",
+  "../../protos/google/identity/accesscontextmanager/type/device_resources.proto",
+  "../../protos/google/identity/accesscontextmanager/v1/access_level.proto",
+  "../../protos/google/identity/accesscontextmanager/v1/access_policy.proto",
+  "../../protos/google/identity/accesscontextmanager/v1/service_perimeter.proto"
 ]
diff --git a/packages/google-cloud-asset/src/v1p1beta1/asset_service_client.ts b/packages/google-cloud-asset/src/v1p1beta1/asset_service_client.ts
index 3bf4d360769..590f00888af 100644
--- a/packages/google-cloud-asset/src/v1p1beta1/asset_service_client.ts
+++ b/packages/google-cloud-asset/src/v1p1beta1/asset_service_client.ts
@@ -139,6 +139,8 @@ export class AssetServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-asset/src/v1p2beta1/asset_service_client.ts b/packages/google-cloud-asset/src/v1p2beta1/asset_service_client.ts
index bc72a283da7..7dcbeee62ba 100644
--- a/packages/google-cloud-asset/src/v1p2beta1/asset_service_client.ts
+++ b/packages/google-cloud-asset/src/v1p2beta1/asset_service_client.ts
@@ -131,6 +131,8 @@ export class AssetServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-asset/src/v1p4beta1/asset_service_client.ts b/packages/google-cloud-asset/src/v1p4beta1/asset_service_client.ts
index 69526ea97fc..0cc2b59fab6 100644
--- a/packages/google-cloud-asset/src/v1p4beta1/asset_service_client.ts
+++ b/packages/google-cloud-asset/src/v1p4beta1/asset_service_client.ts
@@ -137,6 +137,8 @@ export class AssetServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-asset/src/v1p5beta1/asset_service_client.ts b/packages/google-cloud-asset/src/v1p5beta1/asset_service_client.ts
index c2717671446..2e317883c91 100644
--- a/packages/google-cloud-asset/src/v1p5beta1/asset_service_client.ts
+++ b/packages/google-cloud-asset/src/v1p5beta1/asset_service_client.ts
@@ -139,6 +139,8 @@ export class AssetServiceClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
diff --git a/packages/google-cloud-asset/src/v1p5beta1/asset_service_proto_list.json b/packages/google-cloud-asset/src/v1p5beta1/asset_service_proto_list.json
index cb107dd3fa8..98ff312c565 100644
--- a/packages/google-cloud-asset/src/v1p5beta1/asset_service_proto_list.json
+++ b/packages/google-cloud-asset/src/v1p5beta1/asset_service_proto_list.json
@@ -1,4 +1,9 @@
 [
   "../../protos/google/cloud/asset/v1p5beta1/asset_service.proto",
-  "../../protos/google/cloud/asset/v1p5beta1/assets.proto"
+  "../../protos/google/cloud/asset/v1p5beta1/assets.proto",
+  "../../protos/google/cloud/orgpolicy/v1/orgpolicy.proto",
+  "../../protos/google/identity/accesscontextmanager/type/device_resources.proto",
+  "../../protos/google/identity/accesscontextmanager/v1/access_level.proto",
+  "../../protos/google/identity/accesscontextmanager/v1/access_policy.proto",
+  "../../protos/google/identity/accesscontextmanager/v1/service_perimeter.proto"
 ]