diff --git a/lib/Lex/PreprocessingRecord.cpp b/lib/Lex/PreprocessingRecord.cpp
index 9555611..0c8d948 100644
--- a/lib/Lex/PreprocessingRecord.cpp
+++ b/lib/Lex/PreprocessingRecord.cpp
@@ -45,8 +45,9 @@
   ExternalSource->ReadPreprocessedEntities();
 }
 
-PreprocessingRecord::PreprocessingRecord()
-  : ExternalSource(0), NumPreallocatedEntities(0), 
+PreprocessingRecord::PreprocessingRecord(bool IncludeNestedMacroInstantiations)
+  : IncludeNestedMacroInstantiations(IncludeNestedMacroInstantiations),
+    ExternalSource(0), NumPreallocatedEntities(0), 
     LoadedPreallocatedEntities(false)
 {
 }
@@ -120,6 +121,9 @@
 }
 
 void PreprocessingRecord::MacroExpands(const Token &Id, const MacroInfo* MI) {
+  if (!IncludeNestedMacroInstantiations && Id.getLocation().isMacroID())
+    return;
+
   if (MacroDefinition *Def = findMacroDefinition(MI))
     PreprocessedEntities.push_back(
                        new (*this) MacroInstantiation(Id.getIdentifierInfo(),
diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp
index 31fd667..fdc18f8 100644
--- a/lib/Lex/Preprocessor.cpp
+++ b/lib/Lex/Preprocessor.cpp
@@ -527,10 +527,11 @@
 
 CodeCompletionHandler::~CodeCompletionHandler() { }
 
-void Preprocessor::createPreprocessingRecord() {
+void Preprocessor::createPreprocessingRecord(
+                                      bool IncludeNestedMacroInstantiations) {
   if (Record)
     return;
   
-  Record = new PreprocessingRecord;
+  Record = new PreprocessingRecord(IncludeNestedMacroInstantiations);
   addPPCallbacks(Record);
 }