diff --git a/qad/blockview/blockview.cpp b/qad/blockview/blockview.cpp
index 4212850..310b8a5 100644
--- a/qad/blockview/blockview.cpp
+++ b/qad/blockview/blockview.cpp
@@ -27,6 +27,9 @@ BlockView::~BlockView() {
 
 
 void BlockView::_init() {
+	qRegisterMetaType<BlockItem*>();
+	qRegisterMetaType<BlockItemPin*>();
+	qRegisterMetaType<BlockBusItem*>();
 	grid_visible = grid_snap = pm_connect = navigation = m_connect = m_trace_with_buses = prev_tcb = minimap = true;
 	mm_drag = moved = new_branch = new_bus = mm_cancel = iconnect = mm_copy = m_pin_mc = mm_thumb = move_bus_point = wheel_zoom = false;
 	match_bus = bus_from = 0;
diff --git a/qad/blockview/blockview.h b/qad/blockview/blockview.h
index f7cd9ab..0c7010e 100644
--- a/qad/blockview/blockview.h
+++ b/qad/blockview/blockview.h
@@ -30,6 +30,10 @@ QT_BEGIN_HEADER
 
 QT_BEGIN_NAMESPACE
 
+Q_DECLARE_METATYPE(BlockItem*)
+Q_DECLARE_METATYPE(BlockItemPin*)
+Q_DECLARE_METATYPE(BlockBusItem*)
+
 class BlockView: public QGraphicsView
 {
 	Q_OBJECT