diff --git a/include/polarssl/cipher.h b/include/polarssl/cipher.h
index ef8d2811f0..00c42c1d4d 100644
--- a/include/polarssl/cipher.h
+++ b/include/polarssl/cipher.h
@@ -74,7 +74,7 @@ typedef enum {
     POLARSSL_CIPHER_ID_NULL,
     POLARSSL_CIPHER_ID_AES,
     POLARSSL_CIPHER_ID_DES,
-    POLARSSL_CIPHER_ID_3DES,
+    POLARSSL_CIPHER_ID_3DES, /* Unused! */
     POLARSSL_CIPHER_ID_CAMELLIA,
     POLARSSL_CIPHER_ID_BLOWFISH,
     POLARSSL_CIPHER_ID_ARC4,