diff --git a/src/sbbs3/sbbs.h b/src/sbbs3/sbbs.h
index 5209a891b7eafdb8e57aa6d2332f9486763a6363..041a33a53adf931c25874c1bb6d500fc153b21b5 100644
--- a/src/sbbs3/sbbs.h
+++ b/src/sbbs3/sbbs.h
@@ -113,6 +113,9 @@
 #endif
 
 /* xpdev */
+#ifndef LINK_LIST_THREADSAFE
+ #define LINK_LIST_THREADSAFE
+#endif
 #include "genwrap.h"
 #include "dirwrap.h"
 #include "filewrap.h"