diff --git a/src/plugins/sib-history-improved.js b/src/plugins/sib-history-improved.js
index f09ff47686c01f080005f2381c35372c611efa67..72b75eac7b7d8568f7ec315c24693503173b8acd 100644
--- a/src/plugins/sib-history-improved.js
+++ b/src/plugins/sib-history-improved.js
@@ -34,6 +34,14 @@ converse.plugins.add('sib-history-improved', {
         }
       },
     },
+    ChatBox: {
+      /**
+       * Disable this event handler.
+       * Causes the history to be fetched twice for private chats.
+       */
+      afterMessagesFetched() {
+      },
+    },
   },
   initialize() {
     const _converse = this._converse;