diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
index 3702c89..367c9f5 100644
--- a/lib/Sema/Sema.cpp
+++ b/lib/Sema/Sema.cpp
@@ -163,8 +163,8 @@
 Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
            bool CompleteTranslationUnit)
   : LangOpts(pp.getLangOptions()), PP(pp), Context(ctxt), Consumer(consumer),
-    Diags(PP.getDiagnostics()),
-    SourceMgr(PP.getSourceManager()), CurContext(0), PreDeclaratorDC(0),
+    Diags(PP.getDiagnostics()), SourceMgr(PP.getSourceManager()), 
+    ExternalSource(0), CurContext(0), PreDeclaratorDC(0),
     CurBlock(0), PackContext(0), IdResolver(pp.getLangOptions()),
     GlobalNewDeleteDeclared(false), 
     CompleteTranslationUnit(CompleteTranslationUnit) {