diff --git a/VMInstance.py b/VMInstance.py
index 9097c0b4..15cd6dae 100644
--- a/VMInstance.py
+++ b/VMInstance.py
@@ -14,7 +14,7 @@ class VMInstance:
         self.hypervisor = None
         self.state = None
         self.dom = None
-        sleep(0.5)
+        time.sleep(0.5)
 
         # Watch for changes to the hypervisor field in Zookeeper
         @zk.DataWatch(self.zkey + '/hypervisor')