diff --git a/src/crypto/OutgoingRoomKeyRequestManager.js b/src/crypto/OutgoingRoomKeyRequestManager.js
index a24d4c72b..c3f314f7a 100644
--- a/src/crypto/OutgoingRoomKeyRequestManager.js
+++ b/src/crypto/OutgoingRoomKeyRequestManager.js
@@ -302,6 +302,7 @@ export class OutgoingRoomKeyRequestManager {
                                 "Error sending room key request cancellation;"
                                 + " will retry later.", e,
                             );
+                            this._startTimer();
                         });
                     });
                 }