diff --git a/drivers/net/rtl8169.c b/drivers/net/rtl8169.c
index 13fa9c0..9dc10a5 100644
--- a/drivers/net/rtl8169.c
+++ b/drivers/net/rtl8169.c
@@ -501,8 +501,8 @@ static int rtl_send(struct eth_device *dev, void *packet, int length)
 
 	if (currticks() >= to) {
 #ifdef DEBUG_RTL8169_TX
-		puts ("tx timeout/error\n");
-		printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
+		puts("tx timeout/error\n");
+		printf("%s elapsed time : %lu\n", __func__, currticks()-stime);
 #endif
 		ret = 0;
 	} else {
@@ -604,7 +604,7 @@ static void rtl8169_hw_start(struct eth_device *dev)
 	RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xF000);
 
 #ifdef DEBUG_RTL8169
-	printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
+	printf("%s elapsed time : %lu\n", __func__, currticks()-stime);
 #endif
 }
 
@@ -642,7 +642,7 @@ static void rtl8169_init_ring(struct eth_device *dev)
 	}
 
 #ifdef DEBUG_RTL8169
-	printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
+	printf("%s elapsed time : %lu\n", __func__, currticks()-stime);
 #endif
 }
 
@@ -683,7 +683,7 @@ static int rtl_reset(struct eth_device *dev, bd_t *bis)
 	txb[5] = dev->enetaddr[5];
 
 #ifdef DEBUG_RTL8169
-	printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
+	printf("%s elapsed time : %lu\n", __func__, currticks()-stime);
 #endif
 	return 0;
 }