diff --git a/src/ssl.c b/src/ssl.c
index d4067db5d..3c0db2fdd 100644
--- a/src/ssl.c
+++ b/src/ssl.c
@@ -20061,7 +20061,7 @@ int wolfSSL_X509_cmp(const WOLFSSL_X509 *a, const WOLFSSL_X509 *b)
 
 #ifndef NO_WOLFSSL_STUB
     WOLFSSL_ASN1_STRING* wolfSSL_d2i_DISPLAYTEXT(WOLFSSL_ASN1_STRING **asn,
-                                                  unsigned char **in, long len)
+                                             const unsigned char **in, long len)
     {
         WOLFSSL_STUB("d2i_DISPLAYTEXT");
         (void)asn;
@@ -24445,7 +24445,7 @@ const WOLFSSL_X509_ALGOR* wolfSSL_X509_get0_tbs_sigalg(const WOLFSSL_X509 *x509)
 }
 
 /* Sets paobj pointer to X509_ALGOR signature algorithm */
-void wolfSSL_X509_ALGOR_get0(WOLFSSL_ASN1_OBJECT **paobj, int *pptype,
+void wolfSSL_X509_ALGOR_get0(const WOLFSSL_ASN1_OBJECT **paobj, int *pptype,
                             const void **ppval, const WOLFSSL_X509_ALGOR *algor)
 {
     (void)pptype;
diff --git a/tests/api.c b/tests/api.c
index ab95d98a4..372654493 100644
--- a/tests/api.c
+++ b/tests/api.c
@@ -21836,7 +21836,7 @@ static void test_wolfSSL_X509_ALGOR_get0(void)
 {
 #if (defined(OPENSSL_ALL) || defined(WOLFSSL_APACHE_HTTPD)) && !defined(NO_SHA256)
     X509* x509 = NULL;
-    ASN1_OBJECT* obj = NULL;
+    const ASN1_OBJECT* obj = NULL;
     const X509_ALGOR* alg;
     printf(testingFmt, "wolfSSL_X509_ALGOR_get0");
 
diff --git a/wolfssl/ssl.h b/wolfssl/ssl.h
index 3b66a279b..3e655707c 100644
--- a/wolfssl/ssl.h
+++ b/wolfssl/ssl.h
@@ -1280,7 +1280,7 @@ WOLFSSL_API WOLFSSL_ASN1_STRING* wolfSSL_X509_NAME_ENTRY_get_data(WOLFSSL_X509_N
 WOLFSSL_API WOLFSSL_ASN1_STRING* wolfSSL_ASN1_STRING_new(void);
 WOLFSSL_API WOLFSSL_ASN1_STRING* wolfSSL_ASN1_STRING_type_new(int type);
 WOLFSSL_API int wolfSSL_ASN1_STRING_type(const WOLFSSL_ASN1_STRING* asn1);
-WOLFSSL_API WOLFSSL_ASN1_STRING* wolfSSL_d2i_DISPLAYTEXT(WOLFSSL_ASN1_STRING **asn, unsigned char **in, long len);
+WOLFSSL_API WOLFSSL_ASN1_STRING* wolfSSL_d2i_DISPLAYTEXT(WOLFSSL_ASN1_STRING **asn, const unsigned char **in, long len);
 WOLFSSL_API void wolfSSL_ASN1_STRING_free(WOLFSSL_ASN1_STRING* asn1);
 WOLFSSL_API int wolfSSL_ASN1_STRING_set(WOLFSSL_ASN1_STRING* asn1,
                                                   const void* data, int dataSz);
@@ -3579,7 +3579,7 @@ WOLFSSL_API size_t SSL_get_peer_finished(const WOLFSSL *s, void *buf, size_t cou
 WOLFSSL_API int SSL_SESSION_set1_id(WOLFSSL_SESSION *s, const unsigned char *sid, unsigned int sid_len);
 WOLFSSL_API int SSL_SESSION_set1_id_context(WOLFSSL_SESSION *s, const unsigned char *sid_ctx, unsigned int sid_ctx_len);
 WOLFSSL_API const WOLFSSL_X509_ALGOR* wolfSSL_X509_get0_tbs_sigalg(const WOLFSSL_X509 *x);
-WOLFSSL_API void wolfSSL_X509_ALGOR_get0(WOLFSSL_ASN1_OBJECT **paobj, int *pptype, const void **ppval, const WOLFSSL_X509_ALGOR *algor);
+WOLFSSL_API void wolfSSL_X509_ALGOR_get0(const WOLFSSL_ASN1_OBJECT **paobj, int *pptype, const void **ppval, const WOLFSSL_X509_ALGOR *algor);
 WOLFSSL_API WOLFSSL_X509_PUBKEY *wolfSSL_X509_get_X509_PUBKEY(const WOLFSSL_X509* x509);
 WOLFSSL_API int wolfSSL_X509_PUBKEY_get0_param(WOLFSSL_ASN1_OBJECT **ppkalg, const unsigned char **pk, int *ppklen, void **pa, WOLFSSL_X509_PUBKEY *pub);
 WOLFSSL_API int i2t_ASN1_OBJECT(char *buf, int buf_len, WOLFSSL_ASN1_OBJECT *a);