diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 75b32182eb..f1936caca2 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -802,6 +802,7 @@ static void machine_set_loadparm(Object *obj, Visitor *v,
     }
 
     s390_ipl_fmt_loadparm(ms->loadparm, val, errp);
+    g_free(val);
 }
 
 static void ccw_machine_class_init(ObjectClass *oc, void *data)