diff --git a/aes.h b/aes.h
index 0edbf77..8dd2d3b 100644
--- a/aes.h
+++ b/aes.h
@@ -19,6 +19,8 @@
 #endif
 
 #define AES128 1
+//#define AES192 1
+//#define AES256 1
 
 #if defined(ECB) && (ECB == 1)