diff --git a/core-modules/000QubesVm.py b/core-modules/000QubesVm.py
index 2e1fe8f9..a03585a2 100644
--- a/core-modules/000QubesVm.py
+++ b/core-modules/000QubesVm.py
@@ -1414,7 +1414,8 @@ class QubesVm(object):
                 raise
 
         if os.path.exists("/etc/systemd/system/multi-user.target.wants/qubes-vm@" + self.name + ".service"):
-            subprocess.call(["sudo", "systemctl", "-q", "disable","qubes-vm@" + self.name + ".service"])
+            retcode = subprocess.call(["sudo", "systemctl", "-q", "disable",
+                "qubes-vm@" + self.name + ".service"])
             if retcode != 0:
                 raise QubesException("Failed to delete autostart entry for VM")