diff --git a/src/open_telemetry_exporter.cc b/src/open_telemetry_exporter.cc
index de62e74b8d..564f9949c3 100644
--- a/src/open_telemetry_exporter.cc
+++ b/src/open_telemetry_exporter.cc
@@ -149,6 +149,7 @@ static void ot_callback_decref(void *data) {
   sfree(cb->port);
 
   delete cb->ssl_opts;
+  cb->ssl_opts = NULL;
 
   pthread_mutex_unlock(&cb->mu);
   pthread_mutex_destroy(&cb->mu);
diff --git a/src/open_telemetry_receiver.cc b/src/open_telemetry_receiver.cc
index e975a048d3..56c644d56e 100644
--- a/src/open_telemetry_receiver.cc
+++ b/src/open_telemetry_receiver.cc
@@ -80,7 +80,6 @@ struct Listener {
   grpc::SslServerCredentialsOptions *ssl;
 };
 static std::vector<Listener> listeners;
-static grpc::string default_addr("0.0.0.0:4317");
 
 /*
  * helper functions