1 files changed, 3 insertions, 6 deletions
diff --git a/src/cpp/client/secure_credentials.cc b/src/cpp/client/secure_credentials.cc
index 25f6bab7f2..269c523bba 100644
--- a/src/cpp/client/secure_credentials.cc
+++ b/src/cpp/client/secure_credentials.cc
@@ -206,18 +206,15 @@ void MetadataCredentialsPluginWrapper::InvokePlugin(
   std::vector<grpc_metadata> md;
   for (auto it = metadata.begin(); it != metadata.end(); ++it) {
     grpc_metadata md_entry;
-    md_entry.key = SliceFromCopiedString(it->first);
-    md_entry.value = SliceFromCopiedString(it->second);
+    md_entry.key = it->first.c_str();
+    md_entry.value = it->second.data();
+    md_entry.value_length = it->second.size();
     md_entry.flags = 0;
     md.push_back(md_entry);
   }
   cb(user_data, md.empty() ? nullptr : &md[0], md.size(),
      static_cast<grpc_status_code>(status.error_code()),
      status.error_message().c_str());
-  for (auto it = md.begin(); it != md.end(); ++it) {
-    grpc_slice_unref(it->key);
-    grpc_slice_unref(it->value);
-  }
 }
 
 MetadataCredentialsPluginWrapper::MetadataCredentialsPluginWrapper(