diff --git a/host/lib/usrp/usrp1/usrp1_impl.cpp b/host/lib/usrp/usrp1/usrp1_impl.cpp
index 607badd..f440d6e 100644
--- a/host/lib/usrp/usrp1/usrp1_impl.cpp
+++ b/host/lib/usrp/usrp1/usrp1_impl.cpp
@@ -413,6 +413,12 @@ usrp1_impl::~usrp1_impl(void){
         this->enable_rx(false);
         this->enable_tx(false);
     )
+    //Since we need to decontruct the tree,
+    //and dboard manager has tree references:
+    //This reset cleans up the subtree references.
+    BOOST_FOREACH(const std::string &key, _dbc.keys()){
+        _dbc[key].dboard_manager.reset();
+    }
     _tree.reset(); //resets counts on sptrs held in tree
     _soft_time_ctrl.reset(); //stops cmd task before proceeding
     _io_impl.reset(); //stops vandal before other stuff gets deconstructed