diff --git a/techlibs/gowin/synth_gowin.cc b/techlibs/gowin/synth_gowin.cc
index d8d8397b6..86ec9cdc2 100644
--- a/techlibs/gowin/synth_gowin.cc
+++ b/techlibs/gowin/synth_gowin.cc
@@ -191,7 +191,7 @@ struct SynthGowinPass : public ScriptPass
 		if (!nobram && check_label("map_bram", "(skip if -nobram)"))
 		{
 			run("memory_bram -rules +/gowin/brams.txt");
-			run("techmap -map +/gowin/brams_map.v -map +/gowin/cells_sim.v");
+			run("techmap -map +/gowin/brams_map.v");
 		}
 
 		if (!nolutram && check_label("map_lutram", "(skip if -nolutram)"))