diff --git a/aes.c b/aes.c
index e68c6b0..e275ed2 100644
--- a/aes.c
+++ b/aes.c
@@ -464,13 +464,13 @@ static void InvCipher(state_t* state,uint8_t* RoundKey)
 #if defined(ECB) && (ECB == 1)
 
 
-void AES_ECB_encrypt(struct AES_ctx *ctx,const uint8_t* buf)
+void AES_ECB_encrypt(struct AES_ctx *ctx, uint8_t* buf)
 {
   // The next function call encrypts the PlainText with the Key using AES algorithm.
   Cipher((state_t*)buf, ctx->RoundKey);
 }
 
-void AES_ECB_decrypt(struct AES_ctx* ctx,const uint8_t* buf)
+void AES_ECB_decrypt(struct AES_ctx* ctx, uint8_t* buf)
 {
   // The next function call decrypts the PlainText with the Key using AES algorithm.
   InvCipher((state_t*)buf, ctx->RoundKey);