diff --git a/dom0/qvm-core/qubesutils.py b/dom0/qvm-core/qubesutils.py
index 4089b35f..7b8e5add 100644
--- a/dom0/qvm-core/qubesutils.py
+++ b/dom0/qvm-core/qubesutils.py
@@ -78,7 +78,7 @@ def parse_size(size):
 
     size = size.strip().upper()
     if size.isdigit():
-        return size
+        return int(size)
 
     for unit, multiplier in units:
         if size.endswith(unit):