diff --git a/clang/lib/Lex/Preprocessor.cpp b/clang/lib/Lex/Preprocessor.cpp
index 9ce4874..ccb2df0 100644
--- a/clang/lib/Lex/Preprocessor.cpp
+++ b/clang/lib/Lex/Preprocessor.cpp
@@ -69,7 +69,8 @@
     CodeCompletionFile(0), CodeCompletionOffset(0), CodeCompletionReached(0),
     SkipMainFilePreamble(0, true), CurPPLexer(0), 
     CurDirLookup(0), CurLexerKind(CLK_Lexer), Callbacks(0), Listener(0),
-    MacroArgCache(0), Record(0), MIChainHead(0), MICache(0) 
+    MacroArgCache(0), Record(0), MIChainHead(0), MICache(0),
+    ParsingIfOrElifDirective(false)
 {
   OwnsHeaderSearch = OwnsHeaders;