diff --git a/target/linux/brcm63xx/base-files/etc/hotplug.d/firmware/10-rt2x00-eeprom b/target/linux/brcm63xx/base-files/etc/hotplug.d/firmware/10-rt2x00-eeprom
index eeb66e0d18dff4dfa06433efa69e3ed0c32a6ca5..8e229d1d9aec4bc9815436264b852bc5e45de4c3 100644
--- a/target/linux/brcm63xx/base-files/etc/hotplug.d/firmware/10-rt2x00-eeprom
+++ b/target/linux/brcm63xx/base-files/etc/hotplug.d/firmware/10-rt2x00-eeprom
@@ -32,7 +32,7 @@ case "$FIRMWARE" in
 "rt2x00.eeprom" )
 	case $board in
 	HW556_A)
-		rt2x00_eeprom_extract "cal_data" 130560 272
+		rt2x00_eeprom_extract "cal_data" 130560 512
 		;;
 	*)
 		rt2x00_eeprom_die "board $board is not supported yet"