diff --git a/hpb/BUILD b/hpb/BUILD
index 30429894e0..d5e2ddd00b 100644
--- a/hpb/BUILD
+++ b/hpb/BUILD
@@ -30,6 +30,7 @@ cc_library(
     defines = ["HPB_BACKEND_UPB"],
     visibility = ["//visibility:public"],
     deps = [
+        "//hpb:arena",
         "//hpb:extension",
         "//hpb:ptr",
         "//hpb/backend/upb",
diff --git a/hpb/hpb.h b/hpb/hpb.h
index 7c67a4f320..66ed1b6dd7 100644
--- a/hpb/hpb.h
+++ b/hpb/hpb.h
@@ -15,6 +15,7 @@
 #include "absl/status/status.h"
 #include "absl/status/statusor.h"
 #include "absl/strings/string_view.h"
+#include "google/protobuf/hpb/arena.h"
 #include "google/protobuf/hpb/backend/upb/interop.h"
 #include "google/protobuf/hpb/extension.h"
 #include "google/protobuf/hpb/internal/internal.h"
@@ -35,7 +36,6 @@
 
 namespace hpb {
 class ExtensionRegistry;
-using Arena = ::upb::Arena;
 
 // TODO: b/354766950 - Move upb-specific chunks out of hpb header
 inline absl::string_view UpbStrToStringView(upb_StringView str) {
diff --git a/protos/protos.h b/protos/protos.h
index 44477dd759..25faab2fa7 100644
--- a/protos/protos.h
+++ b/protos/protos.h
@@ -8,6 +8,5 @@
 #define UPB_PROTOS_PROTOS_H_
 #include "google/protobuf/hpb/hpb.h"
 namespace protos {
-using hpb::Arena;
 }  // namespace protos
 #endif
diff --git a/rust/test/benchmarks/BUILD b/rust/test/benchmarks/BUILD
index 6a1e2294a9..694feb38da 100644
--- a/rust/test/benchmarks/BUILD
+++ b/rust/test/benchmarks/BUILD
@@ -49,8 +49,8 @@ cc_test(
         ":benchmarks",
         ":proto_benchmarks_cpp",  # build_cleaner: keep
         "//hpb",
+        "//hpb:arena",
         "//hpb:repeated_field",
-        "//protos",
         "//src/google/protobuf:protobuf_lite",
         "//testing/base/public:gunit",
         "//third_party/benchmark",
@@ -71,6 +71,7 @@ cc_test(
         ":benchmarks",
         ":proto_benchmarks_upb",  # build_cleaner: keep
         "//hpb",
+        "//hpb:arena",
         "//hpb:repeated_field",
         "//protos",
         "//src/google/protobuf:protobuf_lite",
diff --git a/rust/test/benchmarks/rust_protobuf_benchmarks.cc b/rust/test/benchmarks/rust_protobuf_benchmarks.cc
index 1a1bcf04f9..2da1b91338 100644
--- a/rust/test/benchmarks/rust_protobuf_benchmarks.cc
+++ b/rust/test/benchmarks/rust_protobuf_benchmarks.cc
@@ -5,11 +5,11 @@
 
 #include <benchmark/benchmark.h>
 #include "absl/log/absl_check.h"
+#include "google/protobuf/hpb/arena.h"
 #include "google/protobuf/hpb/hpb.h"
 #include "google/protobuf/repeated_ptr_field.h"
 #include "google/protobuf/rust/test/benchmarks/bench_data.pb.h"
 #include "google/protobuf/rust/test/benchmarks/bench_data.upb.proto.h"
-#include "protos/protos.h"
 
 using benchmarks::BenchData;
 
@@ -142,7 +142,7 @@ BENCHMARK(BM_add_100_ints_cpp);
 
 void BM_add_100_ints_upb(benchmark::State& state) {
   for (auto s : state) {
-    ::protos::Arena arena;
+    hpb::Arena arena;
     auto data = ::hpb::CreateMessage<benchmarks::protos::BenchData>(arena);
     for (int i = 0; i < 100; ++i) {
       data.add_nums(i);
@@ -184,7 +184,7 @@ void BM_copy_from_100_ints_cpp(benchmark::State& state) {
 BENCHMARK(BM_copy_from_100_ints_cpp);
 
 void BM_copy_from_100_ints_upb(benchmark::State& state) {
-  ::protos::Arena arena;
+  hpb::Arena arena;
   auto source = ::hpb::CreateMessage<benchmarks::protos::BenchData>(arena);
   for (int i = 0; i < 100; ++i) {
     source.add_nums(i);
@@ -228,7 +228,7 @@ void BM_sum_1000_ints_cpp(benchmark::State& state) {
 BENCHMARK(BM_sum_1000_ints_cpp);
 
 void BM_sum_1000_ints_upb(benchmark::State& state) {
-  ::protos::Arena arena;
+  hpb::Arena arena;
   auto data = ::hpb::CreateMessage<benchmarks::protos::BenchData>(arena);
   for (int i = 0; i < 1000; ++i) {
     data.add_nums(i);