diff --git a/sys/dev/ep/if_ep.c b/sys/dev/ep/if_ep.c
index 4ee4b838e1d..aecba9b215e 100644
--- a/sys/dev/ep/if_ep.c
+++ b/sys/dev/ep/if_ep.c
@@ -38,7 +38,7 @@
  */
 
 /*
- *  $Id: if_ep.c,v 1.42 1996/02/26 01:05:34 gibbs Exp $
+ *  $Id: if_ep.c,v 1.43 1996/02/28 17:19:03 gibbs Exp $
  *
  *  Promiscuous mode added and interrupt logic slightly changed
  *  to reduce the number of adapter failures. Transceiver select
@@ -795,7 +795,7 @@ startagain:
 		  m->m_len / 4);
 	    if (m->m_len & 3)
 		outsb(BASE + EP_W1_TX_PIO_WR_1,
-		      mtod(m, caddr_t) + m->m_len / 4,
+		      mtod(m, caddr_t) + (m->m_len & (~3)),
 		      m->m_len & 3);
 	} else {
 	    outsw(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 2);
diff --git a/sys/i386/isa/if_ep.c b/sys/i386/isa/if_ep.c
index 4ee4b838e1d..aecba9b215e 100644
--- a/sys/i386/isa/if_ep.c
+++ b/sys/i386/isa/if_ep.c
@@ -38,7 +38,7 @@
  */
 
 /*
- *  $Id: if_ep.c,v 1.42 1996/02/26 01:05:34 gibbs Exp $
+ *  $Id: if_ep.c,v 1.43 1996/02/28 17:19:03 gibbs Exp $
  *
  *  Promiscuous mode added and interrupt logic slightly changed
  *  to reduce the number of adapter failures. Transceiver select
@@ -795,7 +795,7 @@ startagain:
 		  m->m_len / 4);
 	    if (m->m_len & 3)
 		outsb(BASE + EP_W1_TX_PIO_WR_1,
-		      mtod(m, caddr_t) + m->m_len / 4,
+		      mtod(m, caddr_t) + (m->m_len & (~3)),
 		      m->m_len & 3);
 	} else {
 	    outsw(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 2);