diff --git a/proto/Android.bp b/proto/Android.bp
index 4420263..35dcc98 100644
--- a/proto/Android.bp
+++ b/proto/Android.bp
@@ -12,6 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+filegroup {
+    name: "telephonyprovider-proto-sources",
+    srcs: ["src/**/*.proto"],
+}
+
 java_library_static {
     name: "telephonyprovider-protos",
     proto: {
@@ -21,7 +26,8 @@
             "enum_style=java",
         ],
     },
-    srcs: ["src/**/*.proto"],
+    srcs: [":telephonyprovider-proto-sources"],
+    static_libs: ["libprotobuf-java-nano"],
     sdk_version: "core_platform",
     jarjar_rules: "jarjar-rules.txt",
     // Pin java_version until jarjar is certified to support later versions. http://b/72703434