diff --git a/src/laybasic/laybasic/layIndexedNetlistModel.cc b/src/laybasic/laybasic/layIndexedNetlistModel.cc
index 4dd2ea7c3..7a47834c8 100644
--- a/src/laybasic/laybasic/layIndexedNetlistModel.cc
+++ b/src/laybasic/laybasic/layIndexedNetlistModel.cc
@@ -356,7 +356,7 @@ IndexedNetlistModel::net_subcircuit_pin_pair
 SingleIndexedNetlistModel::subcircuit_pinref_from_index (const subcircuit_pair &subcircuits, size_t index) const
 {
   if (! subcircuits.first) {
-    return IndexedNetlistModel::net_subcircuit_pin_pair (0, 0);
+    return IndexedNetlistModel::net_subcircuit_pin_pair ((const db::NetSubcircuitPinRef *) 0, (const db::NetSubcircuitPinRef *) 0);
   }
 
   std::map<subcircuit_pair, std::vector<net_subcircuit_pin_pair> >::iterator i = m_subcircuit_pins_by_index.find (subcircuits);
@@ -372,12 +372,12 @@ SingleIndexedNetlistModel::subcircuit_pinref_from_index (const subcircuit_pair &
         m_synthetic_pinrefs.push_back (db::NetSubcircuitPinRef (const_cast<db::SubCircuit *> (subcircuits.first), p->id ()));
         ref = & m_synthetic_pinrefs.back ();
       }
-      refs.push_back (net_subcircuit_pin_pair (ref, 0));
+      refs.push_back (net_subcircuit_pin_pair (ref, (const db::NetSubcircuitPinRef *) 0));
     }
 
   }
 
-  return index < i->second.size () ? i->second [index] : IndexedNetlistModel::net_subcircuit_pin_pair (0, 0);
+  return index < i->second.size () ? i->second [index] : IndexedNetlistModel::net_subcircuit_pin_pair ((const db::NetSubcircuitPinRef *) 0, (const db::NetSubcircuitPinRef *) 0);
 }
 
 IndexedNetlistModel::net_terminal_pair
diff --git a/src/laybasic/laybasic/layNetlistBrowserModel.cc b/src/laybasic/laybasic/layNetlistBrowserModel.cc
index b69e2375a..c745dbe4c 100644
--- a/src/laybasic/laybasic/layNetlistBrowserModel.cc
+++ b/src/laybasic/laybasic/layNetlistBrowserModel.cc
@@ -2956,7 +2956,7 @@ NetlistBrowserModel::circuit_from_index (const QModelIndex &index, bool include_
 {
   NetlistModelItemData *d = (NetlistModelItemData *) (index.internalPointer ());
   if (! d) {
-    return std::pair<const db::Circuit *, const db::Circuit *> (0, 0);
+    return std::pair<const db::Circuit *, const db::Circuit *> ((const db::Circuit *) 0, (const db::Circuit *) 0);
   } else {
     return include_parents ? d->circuits () : d->circuits_of_this ();
   }
@@ -2967,7 +2967,7 @@ NetlistBrowserModel::net_from_index (const QModelIndex &index, bool include_pare
 {
   NetlistModelItemData *d = (NetlistModelItemData *) (index.internalPointer ());
   if (! d) {
-    return std::pair<const db::Net *, const db::Net *> (0, 0);
+    return std::pair<const db::Net *, const db::Net *> ((const db::Net *) 0, (const db::Net *) 0);
   } else {
     return include_parents ? d->nets () : d->nets_of_this ();
   }
@@ -2978,7 +2978,7 @@ NetlistBrowserModel::device_from_index (const QModelIndex &index, bool include_p
 {
   NetlistModelItemData *d = (NetlistModelItemData *) (index.internalPointer ());
   if (! d) {
-    return std::pair<const db::Device *, const db::Device *> (0, 0);
+    return std::pair<const db::Device *, const db::Device *> ((const db::Device *) 0, (const db::Device *) 0);
   } else {
     return include_parents ? d->devices () : d->devices_of_this ();
   }
@@ -2989,7 +2989,7 @@ NetlistBrowserModel::subcircuit_from_index (const QModelIndex &index, bool inclu
 {
   NetlistModelItemData *d = (NetlistModelItemData *) (index.internalPointer ());
   if (! d) {
-    return std::pair<const db::SubCircuit *, const db::SubCircuit *> (0, 0);
+    return std::pair<const db::SubCircuit *, const db::SubCircuit *> ((const db::SubCircuit *) 0, (const db::SubCircuit *) 0);
   } else {
     return include_parents ? d->subcircuits () : d->subcircuits_of_this ();
   }
diff --git a/src/laybasic/laybasic/layNetlistCrossReferenceModel.cc b/src/laybasic/laybasic/layNetlistCrossReferenceModel.cc
index bf816b302..de67eba53 100644
--- a/src/laybasic/laybasic/layNetlistCrossReferenceModel.cc
+++ b/src/laybasic/laybasic/layNetlistCrossReferenceModel.cc
@@ -408,7 +408,7 @@ void NetlistCrossReferenceModel::ensure_subcircuit_data_built () const
             if (n1) {
               first_net_to_other_netref.insert (std::make_pair (n1, n2));
             } else {
-              sc_data.nets_per_pins.push_back (std::pair<const db::NetSubcircuitPinRef *, const db::NetSubcircuitPinRef *> (0, n2));
+              sc_data.nets_per_pins.push_back (std::pair<const db::NetSubcircuitPinRef *, const db::NetSubcircuitPinRef *> ((const db::NetSubcircuitPinRef *) 0, n2));
             }
           }
         }
@@ -456,7 +456,7 @@ IndexedNetlistModel::net_subcircuit_pin_pair NetlistCrossReferenceModel::subcirc
     if (index < sc->second.nets_per_pins.size ()) {
       return sc->second.nets_per_pins [index];
     } else {
-      return IndexedNetlistModel::net_subcircuit_pin_pair (0, 0);
+      return IndexedNetlistModel::net_subcircuit_pin_pair ((const db::NetSubcircuitPinRef *) 0, (const db::NetSubcircuitPinRef *) 0);
     }
   } else {
     return IndexedNetlistModel::net_subcircuit_pin_pair (subcircuits.first ? subcircuits.first->netref_for_pin (index) : 0, subcircuits.second ? subcircuits.second->netref_for_pin (index) : 0);