diff --git a/adafruit_gps.py b/adafruit_gps.py
index 3d1b7ee..281f256 100644
--- a/adafruit_gps.py
+++ b/adafruit_gps.py
@@ -112,6 +112,8 @@ def __init__(self, uart, debug=False):
         self.pdop = None
         self.hdop = None
         self.vdop = None
+        self.total_mess_num = None
+        self.mess_num = None
         self.debug = debug
 
     def update(self):