diff --git a/parse.y b/parse.y
index c3f50fd52f..721885e8f5 100644
--- a/parse.y
+++ b/parse.y
@@ -11290,9 +11290,7 @@ rb_node_lambda_new(struct parser_params *p, NODE *nd_args, NODE *nd_body, const
     /* Keep the order of node creation */
     NODE *scope = NEW_SCOPE(nd_args, nd_body, loc);
     rb_node_lambda_t *n = NODE_NEWNODE(NODE_LAMBDA, rb_node_lambda_t, loc);
-    n->not_used = 0;
     n->nd_body = scope;
-    n->not_used2 = 0;
 
     return n;
 }
diff --git a/rubyparser.h b/rubyparser.h
index 2c16b05e33..825687bd83 100644
--- a/rubyparser.h
+++ b/rubyparser.h
@@ -980,9 +980,7 @@ typedef struct RNode_ATTRASGN {
 typedef struct RNode_LAMBDA {
     NODE node;
 
-    VALUE not_used;
     struct RNode *nd_body;
-    VALUE not_used2;
 } rb_node_lambda_t;
 
 typedef struct RNode_ARYPTN {