diff --git a/include/net.h b/include/net.h
index 5a6b8083b3..9e5543086d 100644
--- a/include/net.h
+++ b/include/net.h
@@ -374,7 +374,7 @@ extern uint	NetCksum(uchar *, int);		/* Calculate the checksum	*/
 
 /* Set callbacks */
 extern void	NetSetHandler(rxhand_f *);	/* Set RX packet handler	*/
-extern void	NetSetTimeout(int, thand_f *);	/* Set timeout handler		*/
+extern void	NetSetTimeout(ulong, thand_f *);/* Set timeout handler		*/
 
 /* Transmit "NetTxPacket" */
 extern void	NetSendPacket(volatile uchar *, int);
diff --git a/net/net.c b/net/net.c
index 261f7c187d..90315ca7e2 100644
--- a/net/net.c
+++ b/net/net.c
@@ -585,7 +585,7 @@ NetSetHandler(rxhand_f * f)
 
 
 void
-NetSetTimeout(int iv, thand_f * f)
+NetSetTimeout(ulong iv, thand_f * f)
 {
 	if (iv == 0) {
 		timeHandler = (thand_f *)0;