diff --git a/target/linux/generic-2.6/files/drivers/net/phy/mvswitch.c b/target/linux/generic-2.6/files/drivers/net/phy/mvswitch.c
index 9a85411e0e..b98699e174 100644
--- a/target/linux/generic-2.6/files/drivers/net/phy/mvswitch.c
+++ b/target/linux/generic-2.6/files/drivers/net/phy/mvswitch.c
@@ -32,7 +32,7 @@
 
 /* Undefine this to use trailer mode instead.
  * I don't know if header mode works with all chips */
-//#define HEADER_MODE	1
+#define HEADER_MODE	1
 
 MODULE_DESCRIPTION("Marvell 88E6060 Switch driver");
 MODULE_AUTHOR("Felix Fietkau");