diff --git a/pybind11_protobuf/BUILD b/pybind11_protobuf/BUILD
index c664c9c..112316b 100644
--- a/pybind11_protobuf/BUILD
+++ b/pybind11_protobuf/BUILD
@@ -41,6 +41,7 @@ pybind_library(
     deps = [
         ":check_unknown_fields",
         "@com_google_absl//absl/container:flat_hash_map",
+        "@com_google_absl//absl/debugging:leak_check",
         "@com_google_absl//absl/log",
         "@com_google_absl//absl/log:check",
         "@com_google_absl//absl/memory",
diff --git a/pybind11_protobuf/proto_cast_util.cc b/pybind11_protobuf/proto_cast_util.cc
index bbb5da7..395b999 100644
--- a/pybind11_protobuf/proto_cast_util.cc
+++ b/pybind11_protobuf/proto_cast_util.cc
@@ -13,6 +13,7 @@
 #include <unordered_set>
 #include <utility>
 
+#include "absl/debugging/leak_check.h"
 #include "absl/container/flat_hash_map.h"
 #include "absl/log/check.h"
 #include "absl/log/log.h"
@@ -155,7 +156,8 @@ class GlobalState {
         GlobalState*>
         storage;
     return storage
-        .call_once_and_store_result([]() { return new GlobalState(); })
+        .call_once_and_store_result(
+            []() { return absl::IgnoreLeak(new GlobalState()); })
         .get_stored();
   }