diff --git a/src/libs/cplusplus/SimpleLexer.cpp b/src/libs/cplusplus/SimpleLexer.cpp
index 86aff052f78..280c2d523c6 100644
--- a/src/libs/cplusplus/SimpleLexer.cpp
+++ b/src/libs/cplusplus/SimpleLexer.cpp
@@ -45,7 +45,8 @@ SimpleLexer::SimpleLexer()
       _skipComments(false),
       _qtMocRunEnabled(true),
       _objCEnabled(false),
-      _endedJoined(false)
+      _endedJoined(false),
+      _cxx0xEnabled(false)
 {
 }