diff --git a/src/crypto/index.js b/src/crypto/index.js
index b1866156d..a81697c75 100644
--- a/src/crypto/index.js
+++ b/src/crypto/index.js
@@ -822,10 +822,6 @@ Crypto.prototype.setRoomEncryption = function(roomId, config) {
         throw new Error("Unable to encrypt with " + config.algorithm);
     }
 
-    // remove spurious keys
-    config = {
-        algorithm: config.algorithm,
-    };
     this._sessionStore.storeEndToEndRoom(roomId, config);
 
     const alg = new AlgClass({