diff --git a/cameras/cameraclient.py b/cameras/cameraclient.py
index 6f52148..746cbc4 100644
--- a/cameras/cameraclient.py
+++ b/cameras/cameraclient.py
@@ -1,3 +1,4 @@
+from time import sleep
 from types import SimpleNamespace
 from .waiting_epics import PV, caput, caget
 from .utils import intify