diff --git a/PVE/Storage/DRBDPlugin.pm b/PVE/Storage/DRBDPlugin.pm
index 7335757..97c1ca9 100644
--- a/PVE/Storage/DRBDPlugin.pm
+++ b/PVE/Storage/DRBDPlugin.pm
@@ -42,6 +42,7 @@ sub properties {
 sub options {
     return {
         redundancy => { optional => 1 },
+	content => { optional => 1 },
         nodes => { optional => 1 },
 	disable => { optional => 1 },
     };