diff --git a/fsverity/Android.bp b/fsverity/Android.bp
index 93b4d93..ce3b499 100644
--- a/fsverity/Android.bp
+++ b/fsverity/Android.bp
@@ -44,7 +44,6 @@
     name: "libfsverity_digests_proto_rust",
     crate_name: "fsverity_digests_proto",
     source_stem: "fsverity_digests_proto",
-    use_protobuf3: true,
     protos: [
         "fsverity_digests.proto",
     ],
diff --git a/ondevice-signing/proto/Android.bp b/ondevice-signing/proto/Android.bp
index 6b1e35f..356e661 100644
--- a/ondevice-signing/proto/Android.bp
+++ b/ondevice-signing/proto/Android.bp
@@ -37,7 +37,6 @@
     crate_name: "odsign_proto",
     protos: ["odsign_info.proto"],
     source_stem: "odsign_proto",
-    use_protobuf3: true,
     host_supported: true,
     apex_available: [
         "com.android.compos",