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-rw-r--r--techlibs/ecp5/synth_ecp5.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/techlibs/ecp5/synth_ecp5.cc b/techlibs/ecp5/synth_ecp5.cc
index 24e300fa8..1ecb9cac3 100644
--- a/techlibs/ecp5/synth_ecp5.cc
+++ b/techlibs/ecp5/synth_ecp5.cc
@@ -62,7 +62,7 @@ struct SynthEcp5Pass : 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(" -noccu2\n");
log(" do not use CCU2 cells in output netlist\n");