diff --git a/elaborate.cc b/elaborate.cc
index fab58d9e9..82c052e74 100644
--- a/elaborate.cc
+++ b/elaborate.cc
@@ -164,6 +164,7 @@ void PGAssign::elaborate(Design*des, NetScope*scope) const
 	    NetNet*osig = new NetNet(scope, scope->local_symbol(),
 				     NetNet::TRI, lval->vector_width());
 	    osig->set_line(*this);
+	    osig->local_flag(true);
 	    osig->data_type(rval->data_type());
 	    connect(osig->pin(0), tmp->pin(0));
 	    rval = osig;
diff --git a/netlist.cc b/netlist.cc
index 51cf898f6..462947d52 100644
--- a/netlist.cc
+++ b/netlist.cc
@@ -2295,6 +2295,8 @@ const NetExpr* NetETernary::false_expr() const
 
 ivl_variable_type_t NetETernary::expr_type() const
 {
+      ivl_assert(*this, true_val_);
+      ivl_assert(*this, false_val_);
       ivl_variable_type_t tru = true_val_->expr_type();
       ivl_variable_type_t fal = false_val_->expr_type();
       if (tru == IVL_VT_LOGIC && fal == IVL_VT_BOOL)