diff --git a/qubes/storage/lvm.py b/qubes/storage/lvm.py
index 6dc6063e..be980865 100644
--- a/qubes/storage/lvm.py
+++ b/qubes/storage/lvm.py
@@ -438,4 +438,4 @@ def qubes_lvm(cmd, log=logging.getLogger('qube.storage.lvm')):
 
 
 def reset_cache():
-    qubes.storage.lvm.size_cache = init_cache
+    qubes.storage.lvm.size_cache = init_cache()