diff --git a/cpp/CPP14.g4 b/cpp/CPP14.g4
index a83e33fbc1..f61ed501f2 100644
--- a/cpp/CPP14.g4
+++ b/cpp/CPP14.g4
@@ -172,8 +172,20 @@ postfixexpression
 	| Static_cast '<' thetypeid '>' '(' expression ')'
 	| Reinterpret_cast '<' thetypeid '>' '(' expression ')'
 	| Const_cast '<' thetypeid '>' '(' expression ')'
-	| Typeid '(' expression ')'
-	| Typeid '(' thetypeid ')'
+	| typeidofthetypeid '(' expression ')'
+	| typeidofthetypeid '(' thetypeid ')'
+;
+
+/*
+add a middle layer to eliminate duplicated function declarations
+*/
+typeidofexpr
+:
+	Typeid
+;
+typeidofthetypeid
+:
+	Typeid
 ;
 
 expressionlist