diff --git a/src/packet/secret_key.js b/src/packet/secret_key.js
index b7d5bdf3..e4f88e41 100644
--- a/src/packet/secret_key.js
+++ b/src/packet/secret_key.js
@@ -269,6 +269,7 @@ SecretKey.prototype.decrypt = function (passphrase) {
   }
   this.mpi = this.mpi.concat(parsedMPI);
   this.isDecrypted = true;
+  this.encrypted = null;
   return true;
 };