diff --git a/lib/TableGen/TGLexer.cpp b/lib/TableGen/TGLexer.cpp
index 8c1b4290548..c1b00b66ef5 100644
--- a/lib/TableGen/TGLexer.cpp
+++ b/lib/TableGen/TGLexer.cpp
@@ -80,6 +80,10 @@ int TGLexer::getNextChar() {
   }  
 }
 
+int TGLexer::peekNextChar(int Index) {
+  return *(CurPtr + Index);
+}
+
 tgtok::TokKind TGLexer::LexToken() {
   TokStart = CurPtr;
   // This always consumes at least one character.
diff --git a/lib/TableGen/TGLexer.h b/lib/TableGen/TGLexer.h
index 84d328b12d9..24f8ea4ce5a 100644
--- a/lib/TableGen/TGLexer.h
+++ b/lib/TableGen/TGLexer.h
@@ -109,6 +109,7 @@ private:
   tgtok::TokKind ReturnError(const char *Loc, const Twine &Msg);
   
   int getNextChar();
+  int peekNextChar(int Index);
   void SkipBCPLComment();
   bool SkipCComment();
   tgtok::TokKind LexIdentifier();