diff --git a/clang/include/clang/Lex/HeaderSearch.h b/clang/include/clang/Lex/HeaderSearch.h
index 2b5ebc263639..9687793d67f0 100644
--- a/clang/include/clang/Lex/HeaderSearch.h
+++ b/clang/include/clang/Lex/HeaderSearch.h
@@ -132,7 +132,6 @@ class HeaderSearch {
   };
 
   FileManager &FileMgr;
-  DiagnosticsEngine &Diags;
   /// \#include search path information.  Requests for \#include "x" search the
   /// directory of the \#including file first, then each directory in SearchDirs
   /// consecutively. Requests for <x> search the current dir first, then each
diff --git a/clang/lib/Lex/HeaderSearch.cpp b/clang/lib/Lex/HeaderSearch.cpp
index bb3a67378ad5..e793ea17e86f 100644
--- a/clang/lib/Lex/HeaderSearch.cpp
+++ b/clang/lib/Lex/HeaderSearch.cpp
@@ -41,7 +41,7 @@ ExternalHeaderFileInfoSource::~ExternalHeaderFileInfoSource() {}
 HeaderSearch::HeaderSearch(FileManager &FM, DiagnosticsEngine &Diags,
                            const LangOptions &LangOpts, 
                            const TargetInfo *Target)
-  : FileMgr(FM), Diags(Diags), FrameworkMap(64), 
+  : FileMgr(FM), FrameworkMap(64),
     ModMap(FileMgr, *Diags.getClient(), LangOpts, Target)
 {
   AngledDirIdx = 0;