diff --git a/src/common-crypto/CryptoBackend.ts b/src/common-crypto/CryptoBackend.ts
index bbd6e5ec682..f0b4cb6acd1 100644
--- a/src/common-crypto/CryptoBackend.ts
+++ b/src/common-crypto/CryptoBackend.ts
@@ -78,6 +78,7 @@ export interface CryptoBackend extends SyncCryptoCallbacks, CryptoApi {
      * Get information about the encryption of an event
      *
      * @param event - event to be checked
+     * @deprecated
      */
     getEventEncryptionInfo(event: MatrixEvent): IEncryptedEventInfo;