diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index b4934a3..313938e 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -50,7 +50,7 @@
 #endif
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
-#include "mbedtls/utils.h"
+#include "mbedtls/platform_util.h"
 #endif
 
 #if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY)
@@ -550,7 +550,7 @@
     memcpy( ssl->session_negotiate, &session, sizeof( mbedtls_ssl_session ) );
 
     /* Zeroize instead of free as we copied the content */
-    mbedtls_zeroize( &session, sizeof( mbedtls_ssl_session ) );
+    mbedtls_platform_zeroize( &session, sizeof( mbedtls_ssl_session ) );
 
     MBEDTLS_SSL_DEBUG_MSG( 3, ( "session successfully restored from ticket" ) );