--- xl2tpd-1.3.16.orig/network.c
+++ xl2tpd-1.3.16/network.c
@@ -159,7 +159,8 @@ static inline void fix_hdr (void *buf)
      * Fix the byte order of the header
      */
 
-    struct payload_hdr *p = (struct payload_hdr *) buf;
+    volatile struct payload_hdr *p = (struct payload_hdr *) buf;
+    
     _u16 ver = ntohs (p->ver);
     if (CTBIT (p->ver))
     {