diff --git a/compiler/optimizing/graph_checker.h b/compiler/optimizing/graph_checker.h
index 89fea0a..c8c3c3b 100644
--- a/compiler/optimizing/graph_checker.h
+++ b/compiler/optimizing/graph_checker.h
@@ -85,6 +85,7 @@
  public:
   typedef GraphChecker super_type;
 
+  // TODO: There's no need to pass a separate allocator as we could get it from the graph.
   SSAChecker(ArenaAllocator* allocator, HGraph* graph)
     : GraphChecker(allocator, graph, "art::SSAChecker: ") {}