diff --git a/passes/techmap/techmap.cc b/passes/techmap/techmap.cc
index b49a40704..ff4b4de97 100644
--- a/passes/techmap/techmap.cc
+++ b/passes/techmap/techmap.cc
@@ -1163,6 +1163,8 @@ struct TechmapPass : public Pass {
 		log_header(design, "Executing TECHMAP pass (map to technology primitives).\n");
 		log_push();
 
+		// TODO not sure why signorm breaks on us here yet
+		design->sigNormalize(false);
 		TechmapWorker worker;
 		simplemap_get_mappers(worker.simplemap_mappers);