diff --git a/server/controller/webmin.js b/server/controller/webmin.js
index a18c6578a655d0439103b5e06b472cdc19cda914..ce88f09ca9b8d72d40763efb36dafd07d5cfc85b 100644
--- a/server/controller/webmin.js
+++ b/server/controller/webmin.js
@@ -660,7 +660,7 @@ function WebAdmin (duniterServer, startServices, stopServices, listDuniterUIPlug
         if (head.messageV2 && head.messageV2.match(/:2:/)) {
           //HEAD v2
           const headV2Infos = head.messageV2.split(':')
-          head.freeRooms = headV2Infos[9] + "/" + headV2Infos[10]
+          head.freeRooms = headV2Infos[9] + ":" + headV2Infos[10]
         }
         if (head.message.match(/:1:/)) {
           // HEAD V1
diff --git a/server/lib/routes.js b/server/lib/routes.js
index 7fdb211029ce838efd615fba6b74267000df5e89..de12ed662cef7cf4fd7b2ff671111d96753aa379 100644
--- a/server/lib/routes.js
+++ b/server/lib/routes.js
@@ -161,7 +161,7 @@ module.exports = {
                             // Gestion des différents formats
                             if (head.messageV2 && head.messageV2.match(/:2:/)) {
                                 const headV2Infos = head.message.split(':')
-                                head.freeRooms = headV2Infos[9] + "/" + headV2Infos[10]
+                                head.freeRooms = headV2Infos[9] + ":" + headV2Infos[10]
                             }
                             if (head.message.match(/:1:/)) {
                                 posPubkey = 3;