diff --git a/include/llvm/CodeGen/MachinePostDominators.h b/include/llvm/CodeGen/MachinePostDominators.h
index efadd00485f..a9fc8434abe 100644
--- a/include/llvm/CodeGen/MachinePostDominators.h
+++ b/include/llvm/CodeGen/MachinePostDominators.h
@@ -27,10 +27,12 @@ namespace llvm {
 /// to compute the a post-dominator tree.
 ///
 struct MachinePostDominatorTree : public MachineFunctionPass {
-  static char ID;
-
+private:
   DominatorTreeBase<MachineBasicBlock> *DT;
 
+public:
+  static char ID;
+
   MachinePostDominatorTree();
 
   ~MachinePostDominatorTree();