1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/libcrypto/hmac/hmac.c b/src/lib/libcrypto/hmac/hmac.c
index 5c349bbb56..23b7c98f8f 100644
--- a/src/lib/libcrypto/hmac/hmac.c
+++ b/src/lib/libcrypto/hmac/hmac.c
@@ -109,7 +109,7 @@ void HMAC_Init(HMAC_CTX *ctx, const void *key, int len,
         memcpy(&ctx->md_ctx,&ctx->i_ctx,sizeof(ctx->i_ctx));
         }
 
-void HMAC_Update(HMAC_CTX *ctx, unsigned char *data, int len)
+void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, int len)
         {
         EVP_DigestUpdate(&(ctx->md_ctx),data,len);
         }
@@ -134,7 +134,7 @@ void HMAC_cleanup(HMAC_CTX *ctx)
         }
 
 unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
-                    unsigned char *d, int n, unsigned char *md,
+                    const unsigned char *d, int n, unsigned char *md,
                     unsigned int *md_len)
         {
         HMAC_CTX c;