diff --git a/src/include/netif/ppp/ppp.h b/src/include/netif/ppp/ppp.h
index 326275cf..698a3e29 100644
--- a/src/include/netif/ppp/ppp.h
+++ b/src/include/netif/ppp/ppp.h
@@ -337,13 +337,8 @@ struct ppp_pcb_s {
 #if 0 /* UNUSED - PROXY ARP */
   unsigned int proxy_arp_set           :1; /* Have created proxy arp entry */
 #endif /* UNUSED - PROXY ARP */
-#if VJ_SUPPORT
-  unsigned int vj_enabled              :1; /* Flag indicating VJ compression enabled. */
-#else
-  unsigned int                         :1; /* 1 bit of padding */
-#endif /* VJ_SUPPORT */
 #else /* PPP_IPV4_SUPPORT */
-  unsigned int                         :4; /* 4 bit of padding */
+  unsigned int                         :3; /* 3 bit of padding */
 #endif /* PPP_IPV4_SUPPORT */
 #if PPP_IPV6_SUPPORT
   unsigned int ipv6cp_is_up            :1; /* have called ip6cp_up() */
@@ -352,7 +347,6 @@ struct ppp_pcb_s {
   unsigned int                         :2; /* 2 bit of padding */
 #endif /* PPP_IPV6_SUPPORT */
   unsigned int lcp_echo_timer_running  :1; /* set if a timer is running */
-  unsigned int                         :7; /* 7 bits of padding to round out to 16 bits */
 
   u32_t last_xmit;               /* Time of last transmission. */
 
diff --git a/src/include/netif/ppp/pppos.h b/src/include/netif/ppp/pppos.h
index 4978f3d2..1c962e05 100644
--- a/src/include/netif/ppp/pppos.h
+++ b/src/include/netif/ppp/pppos.h
@@ -78,7 +78,12 @@ struct pppos_pcb_s {
 
   /* flags */
   unsigned int open            :1; /* Set if PPPoS is open */
-  unsigned int                 :7; /* 7 bits of padding to round out to 8 bits */
+#if VJ_SUPPORT
+  unsigned int vj_enabled      :1; /* Flag indicating VJ compression enabled. */
+#else
+  unsigned int                 :1; /* 1 bit of padding */
+#endif /* VJ_SUPPORT */
+  unsigned int                 :6; /* 6 bits of padding to round out to 8 bits */
 
   /* PPPoS rx */
   ext_accm in_accm;                /* Async-Ctl-Char-Map for input. */
diff --git a/src/netif/ppp/pppos.c b/src/netif/ppp/pppos.c
index 26684225..0d98e002 100644
--- a/src/netif/ppp/pppos.c
+++ b/src/netif/ppp/pppos.c
@@ -297,7 +297,7 @@ pppos_netif_output(ppp_pcb *ppp, void *ctx, struct pbuf *pb, u_short protocol)
    * Attempt Van Jacobson header compression if VJ is configured and
    * this is an IP packet.
    */
-  if (protocol == PPP_IP && ppp->vj_enabled) {
+  if (protocol == PPP_IP && pppos->vj_enabled) {
     switch (vj_compress_tcp(&pppos->vj_comp, pb)) {
       case TYPE_IP:
         /* No change...
@@ -850,7 +850,7 @@ pppos_vjc_config(ppp_pcb *ppp, void *ctx, int vjcomp, int cidcomp, int maxcid)
 {
   pppos_pcb *pppos = (pppos_pcb *)ctx;
 
-  ppp->vj_enabled = vjcomp;
+  pppos->vj_enabled = vjcomp;
   pppos->vj_comp.compressSlot = cidcomp;
   pppos->vj_comp.maxSlotIndex = maxcid;
   PPPDEBUG(LOG_INFO, ("pppos_vjc_config[%d]: VJ compress enable=%d slot=%d max slot=%d\n",
@@ -865,7 +865,7 @@ pppos_netif_input(ppp_pcb *ppp, void *ctx, struct pbuf *p, u16_t protocol)
 
   switch(protocol) {
     case PPP_VJC_COMP:      /* VJ compressed TCP */
-      if (!ppp->vj_enabled) {
+      if (!pppos->vj_enabled) {
         break;
       }
       /*
@@ -883,7 +883,7 @@ pppos_netif_input(ppp_pcb *ppp, void *ctx, struct pbuf *p, u16_t protocol)
       break;
 
     case PPP_VJC_UNCOMP:    /* VJ uncompressed TCP */
-      if (!ppp->vj_enabled) {
+      if (!pppos->vj_enabled) {
         break;
       }
       /*