diff --git a/include/llvm/Analysis/LoopInfo.h b/include/llvm/Analysis/LoopInfo.h
index b583b71..783e347 100644
--- a/include/llvm/Analysis/LoopInfo.h
+++ b/include/llvm/Analysis/LoopInfo.h
@@ -147,10 +147,10 @@
   /// block that is outside of the current loop.
   ///
   bool isLoopExiting(const BlockT *BB) const {
-    typedef GraphTraits<BlockT*> BlockTraits;
+    typedef GraphTraits<const BlockT*> BlockTraits;
     for (typename BlockTraits::ChildIteratorType SI =
-         BlockTraits::child_begin(const_cast<BlockT*>(BB)),
-         SE = BlockTraits::child_end(const_cast<BlockT*>(BB)); SI != SE; ++SI) {
+         BlockTraits::child_begin(BB),
+         SE = BlockTraits::child_end(BB); SI != SE; ++SI) {
       if (!contains(*SI))
         return true;
     }
@@ -165,8 +165,8 @@
 
     typedef GraphTraits<Inverse<BlockT*> > InvBlockTraits;
     for (typename InvBlockTraits::ChildIteratorType I =
-         InvBlockTraits::child_begin(const_cast<BlockT*>(H)),
-         E = InvBlockTraits::child_end(const_cast<BlockT*>(H)); I != E; ++I)
+         InvBlockTraits::child_begin(H),
+         E = InvBlockTraits::child_end(H); I != E; ++I)
       if (contains(*I))
         ++NumBackEdges;