diff --git a/artiq/firmware/libboard_artiq/hmc7043_guiexport_6gbps.py b/artiq/firmware/libboard_artiq/hmc7043_guiexport_6gbps.py
index 77841ea0..b5c51dbf 100644
--- a/artiq/firmware/libboard_artiq/hmc7043_guiexport_6gbps.py
+++ b/artiq/firmware/libboard_artiq/hmc7043_guiexport_6gbps.py
@@ -216,8 +216,8 @@ dut.write(0xD3, 0x40)
 # clkgrp1_div2_cfg12_divrat_msb[3:0] = 0x0
 dut.write(0xD4, 0x0)

-# clkgrp1_div2_cfg5_fine_delay[4:0] = 0x0
-dut.write(0xD5, 0x0)
+# clkgrp1_div2_cfg5_fine_delay[4:0] = 0x1
+dut.write(0xD5, 0x1)

 # clkgrp1_div2_cfg5_sel_coarse_delay[4:0] = 0x0
 dut.write(0xD6, 0x0)
@@ -292,8 +292,8 @@ dut.write(0xE7, 0x40)
 # clkgrp2_div2_cfg12_divrat_msb[3:0] = 0x0
 dut.write(0xE8, 0x0)

-# clkgrp2_div2_cfg5_fine_delay[4:0] = 0x0
-dut.write(0xE9, 0x0)
+# clkgrp2_div2_cfg5_fine_delay[4:0] = 0x3
+dut.write(0xE9, 0x3)

 # clkgrp2_div2_cfg5_sel_coarse_delay[4:0] = 0x0
 dut.write(0xEA, 0x0)
@@ -693,4 +693,5 @@ dut.write(0x151, 0x0)
 # clkgrp7_div2_cfg5_drvr_mode[4:3] = 0x1
 # clkgrp7_div2_cfg_outbuf_dyn[5:5] = 0x0
 # clkgrp7_div2_cfg2_mutesel[7:6] = 0x0
-dut.write(0x152, 0xB)
\ No newline at end of file
+dut.write(0x152, 0xB)
+