diff --git a/src/OpenMesh/Tools/VDPM/VHierarchyWindow.cc b/src/OpenMesh/Tools/VDPM/VHierarchyWindow.cc
index 913b9fd2..cdbf7adc 100644
--- a/src/OpenMesh/Tools/VDPM/VHierarchyWindow.cc
+++ b/src/OpenMesh/Tools/VDPM/VHierarchyWindow.cc
@@ -128,8 +128,8 @@ update_buffer(VHierarchyNodeHandle _node_handle)
   while (overflow(_node_handle) == true)
   {
     buffer_max_ *= 2;
-    if (buffer_max_ > (int) vhierarchy_->num_nodes() / 8)
-      buffer_max_ = (int) (1 + vhierarchy_->num_nodes() / 8);
+    if (buffer_max_ > vhierarchy_->num_nodes() / 8)
+      buffer_max_ = 1 + vhierarchy_->num_nodes() / 8;
   }
   
   unsigned char *new_buffer = (unsigned char *) malloc(buffer_size());
diff --git a/src/OpenMesh/Tools/VDPM/VHierarchyWindow.hh b/src/OpenMesh/Tools/VDPM/VHierarchyWindow.hh
index b461b5f8..9c09a3f9 100644
--- a/src/OpenMesh/Tools/VDPM/VHierarchyWindow.hh
+++ b/src/OpenMesh/Tools/VDPM/VHierarchyWindow.hh
@@ -77,7 +77,7 @@ private:
   // bits buffer (byte units)
   unsigned char *buffer_;
   int           buffer_min_;
-  int           buffer_max_;
+  size_t        buffer_max_;
   int           current_pos_;
 
   // window (byte units)