diff --git a/eval/public/structs/cel_proto_wrap_util.cc b/eval/public/structs/cel_proto_wrap_util.cc
index 06feedecd..d0f80171f 100644
--- a/eval/public/structs/cel_proto_wrap_util.cc
+++ b/eval/public/structs/cel_proto_wrap_util.cc
@@ -166,7 +166,7 @@ class DynamicMap : public CelMap {
 
    private:
     void CheckInit() const {
-      absl::MutexLock lock(&mutex_);
+      absl::MutexLock lock(mutex_);
       if (!initialized_) {
         for (const auto& it : values_->fields()) {
           keys_.push_back(CelValue::CreateString(&it.first));
diff --git a/eval/public/structs/protobuf_descriptor_type_provider.cc b/eval/public/structs/protobuf_descriptor_type_provider.cc
index 59adaa71e..68b39c643 100644
--- a/eval/public/structs/protobuf_descriptor_type_provider.cc
+++ b/eval/public/structs/protobuf_descriptor_type_provider.cc
@@ -57,7 +57,7 @@ ProtobufDescriptorProvider::CreateTypeAdapter(absl::string_view name) const {
 
 const ProtoMessageTypeAdapter* ProtobufDescriptorProvider::GetTypeAdapter(
     absl::string_view name) const {
-  absl::MutexLock lock(&mu_);
+  absl::MutexLock lock(mu_);
   auto it = type_cache_.find(name);
   if (it != type_cache_.end()) {
     return it->second.get();