diff --git a/cloudcontrol/node/hypervisor/domains/__init__.py b/cloudcontrol/node/hypervisor/domains/__init__.py
index b196d48a05b894e7b8a1c68f56c660254ac4fc56..1c2e225ddb77f2587aebf170101a5e7245c17ac1 100644
--- a/cloudcontrol/node/hypervisor/domains/__init__.py
+++ b/cloudcontrol/node/hypervisor/domains/__init__.py
@@ -256,6 +256,11 @@ class VirtualMachine(object):
             else:
                 continue
 
+            # Ignore unknown volumes:
+            if volume is None:
+                logger.warn('Unknown volume for vm %s', self.name)
+                continue
+
             path = volume.path
 
             # update cache behaviour