4 files changed, 6 insertions, 0 deletions
diff --git a/lib/vtls/darwinssl.c b/lib/vtls/darwinssl.c
index b4747dcf2..f00a10053 100644
--- a/lib/vtls/darwinssl.c
+++ b/lib/vtls/darwinssl.c
@@ -2753,6 +2753,8 @@ static CURLcode Curl_darwinssl_random(struct Curl_easy *data UNUSED_PARAM,
   size_t i;
   u_int32_t random_number = 0;
 
+  (void)data;
+
   for(i = 0 ; i < length ; i++) {
     if(i % sizeof(u_int32_t) == 0)
       random_number = arc4random();
diff --git a/lib/vtls/mbedtls.c b/lib/vtls/mbedtls.c
index 8a0f05b62..9fc7bd2e1 100644
--- a/lib/vtls/mbedtls.c
+++ b/lib/vtls/mbedtls.c
@@ -1028,6 +1028,7 @@ static void Curl_mbedtls_sha256sum(const unsigned char *input,
                                     unsigned char *sha256sum,
                                     size_t sha256len UNUSED_PARAM)
 {
+  (void)sha256len;
   mbedtls_sha256(input, inputlen, sha256sum, 0);
 }
 
diff --git a/lib/vtls/polarssl.c b/lib/vtls/polarssl.c
index 22ff2dd63..0d70027a1 100644
--- a/lib/vtls/polarssl.c
+++ b/lib/vtls/polarssl.c
@@ -887,6 +887,7 @@ static void Curl_polarssl_sha256sum(const unsigned char *input,
                                     unsigned char *sha256sum,
                                     size_t sha256len UNUSED_PARAM)
 {
+  (void)sha256len;
   sha256(input, inputlen, sha256sum, 0);
 }
 
diff --git a/lib/vtls/schannel.c b/lib/vtls/schannel.c
index 64d180dc4..83d443fd1 100644
--- a/lib/vtls/schannel.c
+++ b/lib/vtls/schannel.c
@@ -1655,6 +1655,8 @@ static CURLcode Curl_schannel_random(struct Curl_easy *data UNUSED_PARAM,
 {
   HCRYPTPROV hCryptProv = 0;
 
+  (void)data;
+
   if(!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL,
                           CRYPT_VERIFYCONTEXT | CRYPT_SILENT))
     return CURLE_FAILED_INIT;