diff --git a/lib/Serialization/ASTReader.cpp b/lib/Serialization/ASTReader.cpp
index 5b55390..9bb9a7a 100644
--- a/lib/Serialization/ASTReader.cpp
+++ b/lib/Serialization/ASTReader.cpp
@@ -3028,6 +3028,10 @@
     }
   }
   UnresolvedModuleRefs.clear();
+
+  // FIXME: How do we load the 'use'd modules? They may not be submodules.
+  // Might be unnecessary as use declarations are only used to build the
+  // module itself.
   
   InitializeContext();
 
diff --git a/lib/Serialization/ASTWriter.cpp b/lib/Serialization/ASTWriter.cpp
index a487922..409c9a1 100644
--- a/lib/Serialization/ASTWriter.cpp
+++ b/lib/Serialization/ASTWriter.cpp
@@ -2421,6 +2421,10 @@
       Stream.EmitRecord(SUBMODULE_EXPORTS, Record);
     }
 
+    //FIXME: How do we emit the 'use'd modules?  They may not be submodules.
+    // Might be unnecessary as use declarations are only used to build the
+    // module itself.
+
     // Emit the link libraries.
     for (unsigned I = 0, N = Mod->LinkLibraries.size(); I != N; ++I) {
       Record.clear();