diff --git a/synth.tcl b/synth.tcl
index 1a73aa66..bd10d2cc 100644
--- a/synth.tcl
+++ b/synth.tcl
@@ -155,7 +155,7 @@ write_ilang $::env(OUT_JSON).pre_abc9.ilang
 if { $::env(USE_ROI) == "TRUE" } {
     synth_xilinx -flatten -abc9 -nosrl -noclkbuf -nodsp -noiopad -nowidelut -run map_ffs:check
 } else {
-    synth_xilinx -flatten -abc9 -nosrl -noclkbuf -nodsp -iopad -nowidelut -run map_ffs:check
+    #synth_xilinx -flatten -abc9 -nosrl -noclkbuf -nodsp -iopad -nowidelut -run map_ffs:check
 }
 
 write_ilang $::env(OUT_JSON).post_abc9.ilang