diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index f38cbba..a1b356c 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -577,20 +577,20 @@
  *	Determine a default network mask, based on the IP address.
  */
 
-static __inline__ int inet_abc_len(u32 addr)
+static __inline__ int inet_abc_len(__be32 addr)
 {
 	int rc = -1;	/* Something else, probably a multicast. */
 
   	if (ZERONET(addr))
   		rc = 0;
 	else {
-		addr = ntohl(addr);
+		__u32 haddr = ntohl(addr);
 
-		if (IN_CLASSA(addr))
+		if (IN_CLASSA(haddr))
 			rc = 8;
-		else if (IN_CLASSB(addr))
+		else if (IN_CLASSB(haddr))
 			rc = 16;
-		else if (IN_CLASSC(addr))
+		else if (IN_CLASSC(haddr))
 			rc = 24;
 	}