diff --git a/lib/syntax_tree.rb b/lib/syntax_tree.rb
index 6bcf710f..4d76ccac 100644
--- a/lib/syntax_tree.rb
+++ b/lib/syntax_tree.rb
@@ -3698,7 +3698,11 @@ def initialize(constant:, superclass:, bodystmt:, location:, comments: [])
     end
 
     def child_nodes
-      [constant, superclass, bodystmt]
+      [].tap do |nodes|
+        nodes << constant
+        nodes << superclass if superclass
+        nodes << bodystmt
+      end
     end
 
     def format(q)