use system_time for bogus insertion_time

1 files changed, 2 insertions, 0 deletions

diff --git a/dexcom_reader/database_records.py b/dexcom_reader/database_records.py
index 1afb593..7cf549e 100644
--- a/dexcom_reader/database_records.py
+++ b/dexcom_reader/database_records.py
@@ -95,6 +95,8 @@ class InsertionRecord(GenericTimestampedRecord):
 
   @property
   def insertion_time(self):
+    if self.data[2] is 0xFFFFFFFF:
+      return self.system_time
     return util.ReceiverTimeToTime(self.data[2])
 
   @property