diff --git a/res/pjproject/pjlib/include/pj/config_site.h b/res/pjproject/pjlib/include/pj/config_site.h
index 65dc1d210f..553eaae562 100644
--- a/res/pjproject/pjlib/include/pj/config_site.h
+++ b/res/pjproject/pjlib/include/pj/config_site.h
@@ -20,6 +20,7 @@
  */
 
 #define PJ_HAS_IPV6 1
+#define PJ_TODO(id)
 
 /*
  * Typical configuration for WinCE target.