diff --git a/include/llvm/CodeGen/SelectionDAGCSEMap.h b/include/llvm/CodeGen/SelectionDAGCSEMap.h
index c44d09b010c..dd1071a3173 100644
--- a/include/llvm/CodeGen/SelectionDAGCSEMap.h
+++ b/include/llvm/CodeGen/SelectionDAGCSEMap.h
@@ -35,6 +35,7 @@ namespace llvm {
   class SelectionDAGCSEMap {
     void **Buckets;
     unsigned NumBuckets;  // Always a power of 2.
+    unsigned NumNodes;
   public:
     class NodeID;
     SelectionDAGCSEMap();