diff --git a/core/commands/pubsub.go b/core/commands/pubsub.go
index a5ff2b906c1..2e8b2566e23 100644
--- a/core/commands/pubsub.go
+++ b/core/commands/pubsub.go
@@ -51,6 +51,18 @@ This is an experimental feature. It is not intended in its current state
 to be used in a production environment.
 
 To use, the daemon must be run with '--enable-pubsub-experiment'.
+`,
+		LongDescription: `
+ipfs pubsub sub subscribes to messages on a given topic.
+
+This is an experimental feature. It is not intended in its current state
+to be used in a production environment.
+
+To use, the daemon must be run with '--enable-pubsub-experiment'.
+
+This command outputs data in the following encodings:
+  * "json"
+(Specified by the "--encoding" or "--enc" flag)
 `,
 	},
 	Arguments: []cmds.Argument{