diff --git a/src/libs/3rdparty/cplusplus/AST.h b/src/libs/3rdparty/cplusplus/AST.h
index dbc79f37e04..f3eb70aa4ac 100644
--- a/src/libs/3rdparty/cplusplus/AST.h
+++ b/src/libs/3rdparty/cplusplus/AST.h
@@ -2415,7 +2415,7 @@ class CPLUSPLUS_EXPORT AlignofExpressionAST: public ExpressionAST
 public:
     int alignof_token = 0;
     int lparen_token = 0;
-    TypeIdAST *typeId;
+    TypeIdAST *typeId = nullptr;
     int rparen_token = 0;
 
 public: