diff --git a/cryptography/lib/src/cryptography/secret_key.dart b/cryptography/lib/src/cryptography/secret_key.dart
index be20d99..88f5264 100644
--- a/cryptography/lib/src/cryptography/secret_key.dart
+++ b/cryptography/lib/src/cryptography/secret_key.dart
@@ -201,6 +201,7 @@ class SecretKeyData extends SecretKey {
   @override
   void destroy() {
     _bytes.destroy();
+    super.destroy();
   }
 
   @override