diff --git a/src/ssl.c b/src/ssl.c
index 8e536ad33..17c67d60f 100644
--- a/src/ssl.c
+++ b/src/ssl.c
@@ -51680,7 +51680,7 @@ int wolfSSL_RSA_public_decrypt(int flen, const unsigned char* from,
  * rsa     Key to use for encryption
  * padding Type of RSA padding to use.
  */
-int wolfSSL_RSA_private_encrypt(int len, unsigned char* in,
+int wolfSSL_RSA_private_encrypt(int len, const unsigned char* in,
                             unsigned char* out, WOLFSSL_RSA* rsa, int padding)
 {
     int sz = 0;
diff --git a/wolfcrypt/src/evp.c b/wolfcrypt/src/evp.c
index 03f25e107..622991c48 100644
--- a/wolfcrypt/src/evp.c
+++ b/wolfcrypt/src/evp.c
@@ -1817,7 +1817,7 @@ WOLFSSL_API int wolfSSL_EVP_PKEY_sign(WOLFSSL_EVP_PKEY_CTX *ctx, unsigned char *
     switch (ctx->pkey->type) {
 #if !defined(NO_RSA) && !defined(HAVE_USER_RSA)
     case EVP_PKEY_RSA:
-        len = wolfSSL_RSA_private_encrypt((int)tbslen, (unsigned char*)tbs, sig,
+        len = wolfSSL_RSA_private_encrypt((int)tbslen, tbs, sig,
               ctx->pkey->rsa, ctx->padding);
         if (len < 0)
             break;
@@ -2443,7 +2443,7 @@ int wolfSSL_EVP_VerifyUpdate(WOLFSSL_EVP_MD_CTX *ctx, const void *data, size_t l
  * returns WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on failure
  */
 int wolfSSL_EVP_VerifyFinal(WOLFSSL_EVP_MD_CTX *ctx,
-        unsigned char*sig, unsigned int siglen, WOLFSSL_EVP_PKEY *pkey)
+        const unsigned char*sig, unsigned int siglen, WOLFSSL_EVP_PKEY *pkey)
 {
     int ret;
     unsigned char md[WC_MAX_DIGEST_SIZE];
diff --git a/wolfssl/openssl/evp.h b/wolfssl/openssl/evp.h
index 0c0dfe666..e3f3c608e 100644
--- a/wolfssl/openssl/evp.h
+++ b/wolfssl/openssl/evp.h
@@ -592,7 +592,7 @@ WOLFSSL_API int wolfSSL_EVP_SignInit_ex(WOLFSSL_EVP_MD_CTX* ctx,
                                      WOLFSSL_ENGINE *impl);
 WOLFSSL_API int wolfSSL_EVP_SignUpdate(WOLFSSL_EVP_MD_CTX *ctx, const void *data, size_t len);
 WOLFSSL_API int wolfSSL_EVP_VerifyFinal(WOLFSSL_EVP_MD_CTX *ctx,
-        unsigned char* sig, unsigned int sig_len, WOLFSSL_EVP_PKEY *pkey);
+        const unsigned char* sig, unsigned int sig_len, WOLFSSL_EVP_PKEY *pkey);
 WOLFSSL_API int wolfSSL_EVP_VerifyInit(WOLFSSL_EVP_MD_CTX *ctx, const WOLFSSL_EVP_MD *type);
 WOLFSSL_API int wolfSSL_EVP_VerifyUpdate(WOLFSSL_EVP_MD_CTX *ctx, const void *data, size_t len);
 
diff --git a/wolfssl/openssl/rsa.h b/wolfssl/openssl/rsa.h
index af9d3ca5e..fcbaa6c81 100644
--- a/wolfssl/openssl/rsa.h
+++ b/wolfssl/openssl/rsa.h
@@ -107,7 +107,7 @@ WOLFSSL_API int wolfSSL_RSA_public_encrypt(int len, const unsigned char* fr,
 	                               unsigned char* to, WOLFSSL_RSA*, int padding);
 WOLFSSL_API int wolfSSL_RSA_private_decrypt(int len, const unsigned char* fr,
 	                               unsigned char* to, WOLFSSL_RSA*, int padding);
-WOLFSSL_API int wolfSSL_RSA_private_encrypt(int len, unsigned char* in,
+WOLFSSL_API int wolfSSL_RSA_private_encrypt(int len, const unsigned char* in,
                             unsigned char* out, WOLFSSL_RSA* rsa, int padding);
 
 WOLFSSL_API int wolfSSL_RSA_size(const WOLFSSL_RSA*);