diff --git a/bin/lsd2_mac b/bin/lsd2_mac
index 60d2971..f2faf9b 100755
Binary files a/bin/lsd2_mac and b/bin/lsd2_mac differ
diff --git a/bin/lsd2_unix b/bin/lsd2_unix
index 0ee07ea..2ae38a5 100755
Binary files a/bin/lsd2_unix and b/bin/lsd2_unix differ
diff --git a/src/utils.cpp b/src/utils.cpp
index 33740cf..7dee63f 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -3114,6 +3114,7 @@ int collapseTree(Pr* pr,Node** nodes,Node** nodes_new,int* &tab, double toCollap
 
 void collapseTreeReOrder(Pr* pr,Node** nodes,Pr* prReduced,Node** nodesReduced,int* &tab){
     int root = (int)(!pr->rooted);
+    nodesReduced[0]=new Node();
     nodesReduced[root]=new Node();
     nodesReduced[root]->P=-1;
     nodesReduced[root]->type=nodes[root]->type;