diff --git a/app/observatory/multiObservatory/config.proto b/app/observatory/multiObservatory/config.proto
index 91b3251f0..3ac3906fb 100644
--- a/app/observatory/multiObservatory/config.proto
+++ b/app/observatory/multiObservatory/config.proto
@@ -7,7 +7,11 @@ option java_package = "com.v2ray.core.app.observatory.multiObservatory";
 option java_multiple_files = true;
 
 import "common/taggedfeatures/skeleton.proto";
+import "common/protoext/extensions.proto";
 
 message Config{
+  option (v2ray.core.common.protoext.message_opt).type = "service";
+  option (v2ray.core.common.protoext.message_opt).short_name = "multiObservatory";
+
   v2ray.core.common.taggedfeatures.Config holders = 1 ;
 }
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