diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index 8ab9886..f5fecb7 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -48,7 +48,7 @@
 #endif
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
-#include "mbedtls/utils.h"
+#include "mbedtls/platform_util.h"
 #endif
 
 #if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
@@ -3286,8 +3286,8 @@
     if( ticket_len == 0 )
         return( 0 );
 
-    mbedtls_zeroize( ssl->session_negotiate->ticket,
-                      ssl->session_negotiate->ticket_len );
+    mbedtls_platform_zeroize( ssl->session_negotiate->ticket,
+                              ssl->session_negotiate->ticket_len );
     mbedtls_free( ssl->session_negotiate->ticket );
     ssl->session_negotiate->ticket = NULL;
     ssl->session_negotiate->ticket_len = 0;