diff --git a/dwave/system/samplers/dwave_sampler.py b/dwave/system/samplers/dwave_sampler.py
index ae3cf3c2..873ecbf1 100644
--- a/dwave/system/samplers/dwave_sampler.py
+++ b/dwave/system/samplers/dwave_sampler.py
@@ -163,6 +163,8 @@ def __init__(self, failover=False, retry_interval=-1, **config):
 
         self.failover = failover
         self.retry_interval = retry_interval
+    def __del__(self):
+        self.client.close()
 
     @property
     def properties(self):