diff --git a/tools/marvin/marvin/integration/lib/base.py b/tools/marvin/marvin/integration/lib/base.py
index 38e8568211d..775b289b149 100755
--- a/tools/marvin/marvin/integration/lib/base.py
+++ b/tools/marvin/marvin/integration/lib/base.py
@@ -424,7 +424,7 @@ class VirtualMachine:
         if custommemory:
             cmd.details[0]["memory"] = custommemory
 
-        if rootdisksize:
+        if rootdisksize >= 0:
             cmd.details[0]["rootdisksize"] = rootdisksize
 
         if group: