diff --git a/src/netif/ppp/ppp.c b/src/netif/ppp/ppp.c
index 8e8fae9f..0ba82f05 100644
--- a/src/netif/ppp/ppp.c
+++ b/src/netif/ppp/ppp.c
@@ -250,8 +250,6 @@ static void pppFreeCurrentInputPacket(PPPControlRx *pcrx);
 /******************************/
 /*** PUBLIC DATA STRUCTURES ***/
 /******************************/
-u_long subnetMask;
-
 static PPPControl pppControl[NUM_PPP]; /* The PPP interface control blocks. */
 
 /*
@@ -447,8 +445,6 @@ pppInit(void)
 
   magicInit();
 
-  subnetMask = PP_HTONL(0xffffff00UL);
-
   for (i = 0; i < NUM_PPP; i++) {
     /* Initialize each protocol to the standard option set. */
     for (j = 0; (protp = ppp_protocols[j]) != NULL; ++j) {
@@ -1282,7 +1278,7 @@ GetMask(u32_t addr)
   }
 
   /* class D nets are disallowed by bad_ip_adrs */
-  mask = subnetMask | htonl(nmask);
+  mask = PP_HTONL(0xffffff00UL) | htonl(nmask);
   
   /* XXX
    * Scan through the system's network interfaces.