diff --git a/lib/curl_md5.h b/lib/curl_md5.h
index b445500fc27350ff0022f7e132941835bebc76ca..9c0e0b5eee657491fe8f1bfda67e6fbd166b3d1c 100644
--- a/lib/curl_md5.h
+++ b/lib/curl_md5.h
@@ -34,9 +34,9 @@ typedef void (* Curl_MD5_update_func)(void *context,
 typedef void (* Curl_MD5_final_func)(unsigned char *result, void *context);
 
 typedef struct {
-  Curl_MD5_init_func     md5_init;      /* Initialize context procedure */
-  Curl_MD5_update_func   md5_update;    /* Update context with data */
-  Curl_MD5_final_func    md5_final;     /* Get final result procedure */
+  Curl_MD5_init_func     md5_init_func;   /* Initialize context procedure */
+  Curl_MD5_update_func   md5_update_func; /* Update context with data */
+  Curl_MD5_final_func    md5_final_func;  /* Get final result procedure */
   unsigned int           md5_ctxtsize;  /* Context structure size */
   unsigned int           md5_resultlen; /* Result length (bytes) */
 } MD5_params;
diff --git a/lib/curl_ntlm_core.c b/lib/curl_ntlm_core.c
index 39952d2f19a2796b6b84ad4659e6d8baa96657fc..6d1fb80919f946b8040e16741ff8f7bc8a38c318 100644
--- a/lib/curl_ntlm_core.c
+++ b/lib/curl_ntlm_core.c
@@ -145,7 +145,7 @@ static void setup_des_key(const unsigned char *key_56,
 {
   char key[8];
   extend_key_56_to_64(key_56, key);
-  des_set_key(des, key);
+  des_set_key(des, (const uint8_t*)key);
 }
 
 #elif defined(USE_GNUTLS)
@@ -389,7 +389,7 @@ CURLcode Curl_ntlm_core_mk_nt_hash(struct SessionHandle *data,
 #elif defined(USE_GNUTLS_NETTLE)
     struct md4_ctx MD4pw;
     md4_init(&MD4pw);
-    md4_update(&MD4pw, 2 * len, pw);
+    md4_update(&MD4pw, (unsigned int)(2 * len), pw);
     md4_digest(&MD4pw, MD4_DIGEST_SIZE, ntbuffer);
 #elif defined(USE_GNUTLS)
     gcry_md_hd_t MD4pw;
diff --git a/lib/md5.c b/lib/md5.c
index 8d66d95ec73fb2fba47a876486ab2af7677e9ba2..c32455e9e61bf707100921eed6a51d80ce5c238d 100644
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -445,7 +445,7 @@ MD5_context *Curl_MD5_init(const MD5_params *md5params)
 
   ctxt->md5_hash = md5params;
 
-  md5params->md5_init(ctxt->md5_hashctx);
+  (*md5params->md5_init_func)(ctxt->md5_hashctx);
 
   return ctxt;
 }
@@ -454,14 +454,14 @@ int Curl_MD5_update(MD5_context *context,
                     const unsigned char *data,
                     unsigned int len)
 {
-  (*context->md5_hash->md5_update)(context->md5_hashctx, data, len);
+  (*context->md5_hash->md5_update_func)(context->md5_hashctx, data, len);
 
   return 0;
 }
 
 int Curl_MD5_final(MD5_context *context, unsigned char *result)
 {
-  (*context->md5_hash->md5_final)(result, context->md5_hashctx);
+  (*context->md5_hash->md5_final_func)(result, context->md5_hashctx);
 
   free(context->md5_hashctx);
   free(context);