diff --git a/td_tp/tp2/README.md b/td_tp/tp2/README.md
index 36290e6..90da95f 100644
--- a/td_tp/tp2/README.md
+++ b/td_tp/tp2/README.md
@@ -66,14 +66,14 @@ Ainsi, le bit de poids faible (rang 0) est placé au rang 5.
 
     unsigned char encrypt(
 		 unsigned char w,
-		 unsigned short key[2],
+		 unsigned short key,
 		 unsigned char perm[8],
 		 unsigned char subst[16]
 	);
 
     unsigned char decrypt(
 		 unsigned char w,
-		 unsigned short key[2],
+		 unsigned short key,
 		 unsigned char perm[8],
 		 unsigned char subst[16]
 	);