diff --git a/opensubdiv/far/topologyRefiner.cpp b/opensubdiv/far/topologyRefiner.cpp
index 3e72776d..b8ef0aeb 100644
--- a/opensubdiv/far/topologyRefiner.cpp
+++ b/opensubdiv/far/topologyRefiner.cpp
@@ -118,6 +118,7 @@ TopologyRefiner::Unrefine() {
         delete _refinements[i];
     }
     _refinements.clear();
+    _maxLevel = 0;
 
     assembleFarLevels();
 }