1 files changed, 5 insertions, 2 deletions
diff --git a/lib/hier_block.cpp b/lib/hier_block.cpp
index 4c0aef3..ab474c5 100644
--- a/lib/hier_block.cpp
+++ b/lib/hier_block.cpp
@@ -40,8 +40,11 @@ void HierBlock::disconnect(const Element &elem)
 
 static Apology::Wax get_ref(const Element &elem)
 {
-    boost::shared_ptr<Element> shared_self = elem.weak_self.lock();
-    if (shared_self) return shared_self;
+    if (elem.weak_self)
+    {
+        boost::shared_ptr<void> shared_self = elem.weak_self->lock();
+        if (shared_self) return shared_self;
+    }
     return elem;
 }