1 files changed, 1 insertions, 1 deletions
diff --git a/ast.c b/ast.c
index adb7287ed3..d60e5d3fcf 100644
--- a/ast.c
+++ b/ast.c
@@ -377,7 +377,7 @@ rest_arg(rb_ast_t *ast, const NODE *rest_arg)
 static VALUE
 node_children(rb_ast_t *ast, const NODE *node)
 {
-    char name[DECIMAL_SIZE_OF_BITS(sizeof(long) * CHAR_BIT) + 2]; /* including '$' */
+    char name[sizeof("$") + DECIMAL_SIZE_OF(long)];
 
     enum node_type type = nd_type(node);
     switch (type) {