diff --git a/net_link.cc b/net_link.cc
index 2ed0588b1..0d99acd90 100644
--- a/net_link.cc
+++ b/net_link.cc
@@ -278,7 +278,7 @@ bool Nexus::assign_lval() const
 	    if (net == 0)
 		  continue;
 
-	    if (net->peek_lref())
+	    if (net->peek_lref() > 0)
 		  return true;
       }
 
diff --git a/scripts/devel-stub.conf b/scripts/devel-stub.conf
index 01009dc3d..5982f4988 100644
--- a/scripts/devel-stub.conf
+++ b/scripts/devel-stub.conf
@@ -20,6 +20,7 @@ debug:elaborate
 debug:elab_pexpr
 debug:scopes
 debug:synth2
+debug:optimizer
 out:a.out
 ivlpp:./ivlpp/ivlpp -D__ICARUS__ -L -Pfoo.pp
 sys_func:scripts/devel-stub.sft