diff --git a/include/polarssl/ssl.h b/include/polarssl/ssl.h
index cd9f770..54382e5 100644
--- a/include/polarssl/ssl.h
+++ b/include/polarssl/ssl.h
@@ -1980,7 +1980,8 @@
  */
 int ssl_check_cert_usage( const x509_crt *cert,
                           const ssl_ciphersuite_t *ciphersuite,
-                          int cert_endpoint );
+                          int cert_endpoint,
+                          int *flags );
 #endif /* POLARSSL_X509_CRT_PARSE_C */
 
 /* constant-time buffer comparison */