diff --git a/src/SlashCommands.js b/src/SlashCommands.js
index f25bc9af07..3eab42e4d4 100644
--- a/src/SlashCommands.js
+++ b/src/SlashCommands.js
@@ -380,8 +380,9 @@ export const CommandMap = {
                         room_id: roomId,
                         opts: {
                             // These are passed down to the js-sdk's /join call
-                            server_name: viaServers,
+                            viaServers: viaServers,
                         },
+                        via_servers: viaServers, // for the rejoin button
                         auto_join: true,
                     });
                     return success();
@@ -422,10 +423,14 @@ export const CommandMap = {
                     }
 
                     if (viaServers) {
+                        // For the join
                         dispatch["opts"] = {
                             // These are passed down to the js-sdk's /join call
-                            server_name: viaServers,
+                            viaServers: viaServers,
                         };
+
+                        // For if the join fails (rejoin button)
+                        dispatch['via_servers'] = viaServers;
                     }
 
                     dis.dispatch(dispatch);