diff --git a/passes/cmds/splitnets.cc b/passes/cmds/splitnets.cc
index d61a99ec0..f943127de 100644
--- a/passes/cmds/splitnets.cc
+++ b/passes/cmds/splitnets.cc
@@ -145,6 +145,9 @@ struct SplitnetsPass : public Pass {
 		}
 		extra_args(args, argidx, design);
 
+		// TODO disable signorm due to rewrite_sigspecs assert
+		design->sigNormalize(false);
+
 		// module_ports_db[module_name][old_port_name] = new_port_name_list
 		dict<IdString, dict<IdString, vector<IdString>>> module_ports_db;
 
diff --git a/passes/equiv/equiv_miter.cc b/passes/equiv/equiv_miter.cc
index 6acfe85a9..ead6ea7a4 100644
--- a/passes/equiv/equiv_miter.cc
+++ b/passes/equiv/equiv_miter.cc
@@ -319,6 +319,9 @@ struct EquivMiterPass : public Pass {
 		worker.miter_name = RTLIL::escape_id(args[argidx++]);
 		extra_args(args, argidx, design);
 
+		// TODO disable signorm due to rewrite_sigspecs assert
+		design->sigNormalize(false);
+
 		if (design->module(worker.miter_name))
 			log_cmd_error("Miter module %s already exists.\n", log_id(worker.miter_name));
 
diff --git a/passes/sat/freduce.cc b/passes/sat/freduce.cc
index 4b0669c25..7abc661c1 100644
--- a/passes/sat/freduce.cc
+++ b/passes/sat/freduce.cc
@@ -827,6 +827,8 @@ struct FreducePass : public Pass {
 			break;
 		}
 		extra_args(args, argidx, design);
+		// TODO disable signorm due to rewrite_sigspecs assert
+		design->sigNormalize(false);
 
 		int bitcount = 0;
 		for (auto module : design->selected_modules()) {
diff --git a/passes/techmap/abc9_ops.cc b/passes/techmap/abc9_ops.cc
index 4000fb598..169ec8ba1 100644
--- a/passes/techmap/abc9_ops.cc
+++ b/passes/techmap/abc9_ops.cc
@@ -1834,6 +1834,7 @@ struct Abc9OpsPass : public Pass {
 		extra_args(args, argidx, design);
 
 		// TODO Disabled signorm because swap_names breaks fanout logic
+		// TODO disable signorm due to rewrite_sigspecs assert
 		design->sigNormalize(false);
 
 		if (!valid)
diff --git a/passes/techmap/constmap.cc b/passes/techmap/constmap.cc
index 6d18b8494..f0ca4a609 100644
--- a/passes/techmap/constmap.cc
+++ b/passes/techmap/constmap.cc
@@ -71,6 +71,8 @@ struct ConstmapPass : public Pass {
 		}
 		extra_args(args, argidx, design);
 
+		// TODO disable signorm due to rewrite_sigspecs assert
+		design->sigNormalize(false);
 
 		if (design->has(celltype)) {
 			Module *existing = design->module(celltype);
diff --git a/passes/techmap/hilomap.cc b/passes/techmap/hilomap.cc
index c1b947221..0cd81ded4 100644
--- a/passes/techmap/hilomap.cc
+++ b/passes/techmap/hilomap.cc
@@ -105,6 +105,9 @@ struct HilomapPass : public Pass {
 		}
 		extra_args(args, argidx, design);
 
+		// TODO disable signorm due to rewrite_sigspecs assert
+		design->sigNormalize(false);
+
 		for (auto mod : design->selected_modules())
 		{
 			module = mod;