diff --git a/tools/marvin/marvin/integration/lib/base.py b/tools/marvin/marvin/integration/lib/base.py
index 830914c0b4c..3751d987785 100644
--- a/tools/marvin/marvin/integration/lib/base.py
+++ b/tools/marvin/marvin/integration/lib/base.py
@@ -1136,7 +1136,7 @@ class DiskOffering:
         if domainid:
             cmd.domainid = domainid
 
-        if services["storagetype"]:
+        if "storagetype" in services:
             cmd.storagetype = services["storagetype"]
 
         return DiskOffering(apiclient.createDiskOffering(cmd).__dict__)