diff --git a/net/net.c b/net/net.c
index d13ae74..11b7700 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1574,7 +1574,7 @@
 NetCksum(uchar * ptr, int len)
 {
 	ulong	xsum;
-	ushort *p = ptr;
+	ushort *p = (ushort *)ptr;
 
 	xsum = 0;
 	while (len-- > 0)