diff --git a/tgt-blif/blif.conf b/tgt-blif/blif.conf
index 0d9fbf8ea..05d8105b9 100644
--- a/tgt-blif/blif.conf
+++ b/tgt-blif/blif.conf
@@ -1,3 +1,6 @@
+functor:synth2
+functor:synth
+functor:syn-rules
 functor:cprop
 functor:nodangle
 flag:DLL=blif.tgt