diff --git a/src/crypto/algorithms/megolm.js b/src/crypto/algorithms/megolm.js
index 52385e43a..0976302a6 100644
--- a/src/crypto/algorithms/megolm.js
+++ b/src/crypto/algorithms/megolm.js
@@ -311,7 +311,7 @@ MegolmEncryption.prototype._ensureOutboundSession = async function(
                         }
 
                         await this._shareKeyWithDevices(
-                            session, key, payload, retryDevices, failedDevices,
+                            session, key, payload, retryDevices, failedDevices, 30000,
                         );
 
                         await this._notifyFailedOlmDevices(session, key, failedDevices);