diff --git a/soc/targets/artiq_pipistrello.py b/soc/targets/artiq_pipistrello.py
index 7a16cdcfe..2e0f682e4 100644
--- a/soc/targets/artiq_pipistrello.py
+++ b/soc/targets/artiq_pipistrello.py
@@ -113,7 +113,6 @@ class NIST_QC1(BaseSoC, AMPSoC):
                          sdram_controller_settings=MiniconSettings(l2_size=64*1024),
                          with_timer=False, **kwargs)
         AMPSoC.__init__(self)
-        platform.toolchain.bitgen_opt = "-g Binary:Yes -w"
         platform.toolchain.ise_commands += """
 trce -v 12 -fastpaths -tsi {build_name}.tsi -o {build_name}.twr {build_name}.ncd {build_name}.pcf
 """