diff --git a/compiler/dex/mir_graph.h b/compiler/dex/mir_graph.h
index ea2ca39..7dc24e6 100644
--- a/compiler/dex/mir_graph.h
+++ b/compiler/dex/mir_graph.h
@@ -559,7 +559,7 @@
 class MIRGraph {
  public:
   MIRGraph(CompilationUnit* cu, ArenaAllocator* arena);
-  ~MIRGraph();
+  virtual ~MIRGraph();
 
   /*
    * Examine the graph to determine whether it's worthwile to spend the time compiling
@@ -1178,6 +1178,7 @@
   void ComputeDefBlockMatrix();
   void ComputeDominators();
   void CompilerInitializeSSAConversion();
+  virtual void InitializeBasicBlockDataFlow();
   void InsertPhiNodes();
   void DoDFSPreOrderSSARename(BasicBlock* block);