diff --git a/Tools/peg_generator/pegen/c_generator.py b/Tools/peg_generator/pegen/c_generator.py
index c93b348e2b44c9..e8107ec044d0ab 100644
--- a/Tools/peg_generator/pegen/c_generator.py
+++ b/Tools/peg_generator/pegen/c_generator.py
@@ -722,4 +722,7 @@ def collect_vars(self, node: Alt) -> Dict[Optional[str], Optional[str]]:
 
     def add_var(self, node: NamedItem) -> Tuple[Optional[str], Optional[str]]:
         call = self.callmakervisitor.visit(node.item)
-        return self.dedupe(node.name if node.name else call.assigned_variable), call.return_type
+        name = node.name if node.name else call.assigned_variable
+        if name is not None:
+            name = self.dedupe(name)
+        return name, call.return_type