diff --git a/drivers/net/tulip/winbond-840.c b/drivers/net/tulip/winbond-840.c
index 35d0cfcf8c47..50068194c163 100644
--- a/drivers/net/tulip/winbond-840.c
+++ b/drivers/net/tulip/winbond-840.c
@@ -107,8 +107,6 @@ static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
 /* Time in jiffies before concluding the transmitter is hung. */
 #define TX_TIMEOUT  (2*HZ)
 
-#define PKT_BUF_SZ		1536			/* Size of each temporary Rx buffer.*/
-
 /* Include files, designed to support most kernel versions 2.0.0 and later. */
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -137,6 +135,9 @@ static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
 
 #include "tulip.h"
 
+#undef PKT_BUF_SZ			/* tulip.h also defines this */
+#define PKT_BUF_SZ		1536	/* Size of each temporary Rx buffer.*/
+
 /* These identify the driver base version and may not be removed. */
 static char version[] =
 KERN_INFO DRV_NAME ".c:v" DRV_VERSION " (2.4 port) " DRV_RELDATE "  Donald Becker <becker@scyld.com>\n"