diff --git a/options.h b/options.h
index 7a9cb64..5ec19fc 100644
--- a/options.h
+++ b/options.h
@@ -278,7 +278,7 @@ etc) slower (perhaps by 50%). Recommended for most small systems. */
 #define MAX_MAC_LEN SHA1_HASH_SIZE
 
 
-#define MAX_KEY_LEN 32 /* 256 bytes for aes256 etc */
+#define MAX_KEY_LEN 32 /* 256 bits for aes256 etc */
 #define MAX_IV_LEN 20 /* must be same as max blocksize, 
 						 and >= SHA1_HASH_SIZE */
 #define MAX_MAC_KEY 20