session FEATURE thread-safe tls authentication
diff --git a/src/session_p.h b/src/session_p.h
index df37221..6db3909 100644
--- a/src/session_p.h
+++ b/src/session_p.h
@@ -95,6 +95,9 @@
         const char *name;
     } *ctn;
     uint16_t ctn_count;
+
+    pthread_key_t verify_key;
+    pthread_once_t verify_once;
 };
 
 #endif /* ENABLE_TLS */