diff --git a/gateware/icE1usb/rtl/top.v b/gateware/icE1usb/rtl/top.v
index fdf75a1..7762fb0 100644
--- a/gateware/icE1usb/rtl/top.v
+++ b/gateware/icE1usb/rtl/top.v
@@ -316,7 +316,7 @@
 
 	// Controller
 	i2c_master_wb #(
-		.DW(3),
+		.DW(4),
 		.FIFO_DEPTH(0)
 	) i2c_I (
 		.scl_oe  (i2c_scl_oe),