diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index fcfa1bd..ea8671f 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -124,11 +124,11 @@
 
 #define DEFAULT_TX_COALESCE 1
 #define DEFAULT_TXCOUNT	16
-#define DEFAULT_TXTIME	4
+#define DEFAULT_TXTIME	21
 
 #define DEFAULT_RX_COALESCE 1
 #define DEFAULT_RXCOUNT	16
-#define DEFAULT_RXTIME	4
+#define DEFAULT_RXTIME	21
 
 #define TBIPA_VALUE		0x1f
 #define MIIMCFG_INIT_VALUE	0x00000007