diff --git a/include/llvm/IR/DebugInfo.h b/include/llvm/IR/DebugInfo.h
index d640e8e3fb4..f4d70ad3373 100644
--- a/include/llvm/IR/DebugInfo.h
+++ b/include/llvm/IR/DebugInfo.h
@@ -605,6 +605,7 @@ class DIGlobalVariable : public DIDescriptor {
 public:
   explicit DIGlobalVariable(const MDNode *N = 0) : DIDescriptor(N) {}
 
+  // FIXME: use DIScopeRef for LTO type uniqueing.
   DIScope getContext() const { return getFieldAs<DIScope>(2); }
   StringRef getName() const { return getStringField(3); }
   StringRef getDisplayName() const { return getStringField(4); }
@@ -638,6 +639,7 @@ class DIVariable : public DIDescriptor {
 public:
   explicit DIVariable(const MDNode *N = 0) : DIDescriptor(N) {}
 
+  // FIXME: use DIScopeRef for LTO type uniqueing.
   DIScope getContext() const { return getFieldAs<DIScope>(1); }
   StringRef getName() const { return getStringField(2); }
   DIFile getFile() const { return getFieldAs<DIFile>(3); }