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-rw-r--r--techlibs/ice40/synth_ice40.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index d114b6269..8899bfcc4 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -274,7 +274,7 @@ struct SynthIce40Pass : public ScriptPass
else
run("techmap -map +/techmap.v -map +/ice40/arith_map.v");
if (retime || help_mode)
- run("abc -dff -D 1", "(only if -retime)");
+ run("abc -dff", "(only if -retime)");
run("ice40_opt");
}