diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index 78c62213e..0474e76e9 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -67,9 +67,6 @@ struct SynthIce40Pass : public ScriptPass
 		log("    -retime\n");
 		log("        run 'abc' with -dff option\n");
 		log("\n");
-		log("    -relut\n");
-		log("        combine LUTs after synthesis\n");
-		log("\n");
 		log("    -nocarry\n");
 		log("        do not use SB_CARRY cells in output netlist\n");
 		log("\n");
@@ -106,7 +103,7 @@ struct SynthIce40Pass : public ScriptPass
 	}
 
 	string top_opt, blif_file, edif_file, json_file, abc, device_opt;
-	bool nocarry, nodffe, nobram, dsp, flatten, retime, relut, noabc, abc2, vpr;
+	bool nocarry, nodffe, nobram, dsp, flatten, retime, noabc, abc2, vpr;
 	int min_ce_use;
 
 	void clear_flags() YS_OVERRIDE
@@ -122,7 +119,6 @@ struct SynthIce40Pass : public ScriptPass
 		dsp = false;
 		flatten = true;
 		retime = false;
-		relut = false;
 		noabc = false;
 		abc2 = false;
 		vpr = false;
@@ -175,7 +171,7 @@ struct SynthIce40Pass : public ScriptPass
 				continue;
 			}
 			if (args[argidx] == "-relut") {
-				relut = true;
+				// removed, opt_lut is always run
 				continue;
 			}
 			if (args[argidx] == "-nocarry") {
@@ -347,10 +343,8 @@ struct SynthIce40Pass : public ScriptPass
 					run(abc + " -dress -lut 4", "(skip if -noabc)");
 			}
 			run("clean");
-			if (relut || help_mode) {
-				run("ice40_unlut", "                            (only if -relut)");
-				run("opt_lut -dlogic SB_CARRY:I0=1:I1=2:CI=3", "(only if -relut)");
-			}
+			run("ice40_unlut");
+			run("opt_lut -dlogic SB_CARRY:I0=1:I1=2:CI=3");
 		}
 
 		if (check_label("map_cells"))