diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 14ee521..f1d2dd2 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -5372,7 +5372,7 @@
 
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
 void mbedtls_ssl_conf_cert_profile( mbedtls_ssl_config *conf,
-                                    mbedtls_x509_crt_profile *profile )
+                                    const mbedtls_x509_crt_profile *profile )
 {
     conf->cert_profile = profile;
 }