diff --git a/redistimeseries/client.py b/redistimeseries/client.py
index c493768..fc34ffb 100644
--- a/redistimeseries/client.py
+++ b/redistimeseries/client.py
@@ -24,7 +24,7 @@ def __init__(self, args):
         self.total_samples = response['totalSamples']
         self.labels = list_to_dict(response['labels'])
         self.retention_msecs = response['retentionTime']
-        self.lastTimeStamp = response['lastTimestamp']
+        self.last_time_stamp = response['lastTimestamp']
         self.first_time_stamp = response['firstTimestamp']
         self.maxSamplesPerChunk = response['maxSamplesPerChunk']