diff --git a/passes/cmds/setundef.cc b/passes/cmds/setundef.cc
index 9b0c30cae..c67953976 100644
--- a/passes/cmds/setundef.cc
+++ b/passes/cmds/setundef.cc
@@ -308,6 +308,7 @@ struct SetundefPass : public Pass {
             log("Exposing undriven wire %s as input.\n", wire->name.c_str());
           }
           module->fixup_ports();
+          continue;
         }
         else {
           SigMap sigmap(module);