diff --git a/src/MatrixClientPeg.ts b/src/MatrixClientPeg.ts
index 8a0c2d63cb..c65884e350 100644
--- a/src/MatrixClientPeg.ts
+++ b/src/MatrixClientPeg.ts
@@ -274,10 +274,10 @@ class _MatrixClientPeg implements IMatrixClientPeg {
         // These are always installed regardless of the labs flag so that
         // cross-signing features can toggle on without reloading and also be
         // accessed immediately after login.
-        const customisatedCallbacks = {
+        const customisedCallbacks = {
             getDehydrationKey: SecurityCustomisations.getDehydrationKey,
         };
-        Object.assign(opts.cryptoCallbacks, crossSigningCallbacks, customisatedCallbacks);
+        Object.assign(opts.cryptoCallbacks, crossSigningCallbacks, customisedCallbacks);
 
         this.matrixClient = createMatrixClient(opts);