diff --git a/PVE/Storage/NexentaPlugin.pm b/PVE/Storage/NexentaPlugin.pm
index 5a37ba4..9352c74 100644
--- a/PVE/Storage/NexentaPlugin.pm
+++ b/PVE/Storage/NexentaPlugin.pm
@@ -168,7 +168,7 @@ sub options {
 	password => { fixed => 1 },
         pool => { fixed => 1 },
         blocksize => { fixed => 1 },
-        ssl => { fixed => 1 },
+        ssl => { optional => 1 },
 	content => { optional => 1 },
     };