diff --git a/parse.y b/parse.y
index 0375f0b1d4..7b7a95b78f 100644
--- a/parse.y
+++ b/parse.y
@@ -11849,8 +11849,6 @@ rb_node_str_new(struct parser_params *p, VALUE nd_lit, const YYLTYPE *loc)
 {
     rb_node_str_t *n = NODE_NEWNODE(NODE_STR, rb_node_str_t, loc);
     n->nd_lit = nd_lit;
-    n->not_used = 0;
-    n->not_used2 = 0;
 
     return n;
 }
diff --git a/rubyparser.h b/rubyparser.h
index e7f7eca973..c13883bd60 100644
--- a/rubyparser.h
+++ b/rubyparser.h
@@ -618,8 +618,6 @@ typedef struct RNode_STR {
     NODE node;
 
     VALUE nd_lit;
-    VALUE not_used;
-    VALUE not_used2;
 } rb_node_str_t;
 
 /* RNode_DSTR, RNode_DXSTR and RNode_DSYM should be same structure */