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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 fe1228165..463c2063a 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -65,7 +65,7 @@ struct SynthIce40Pass : public ScriptPass
log(" do not flatten design before synthesis\n");
log("\n");
log(" -retime\n");
- log(" run 'abc' with -dff option\n");
+ log(" run 'abc' with '-dff -D 1' options\n");
log("\n");
log(" -nocarry\n");
log(" do not use SB_CARRY cells in output netlist\n");