diff --git a/tool/ruby_vm/views/mjit_instruction.rb.erb b/tool/ruby_vm/views/mjit_instruction.rb.erb
index 1f49669fa5..1c462de53a 100644
--- a/tool/ruby_vm/views/mjit_instruction.rb.erb
+++ b/tool/ruby_vm/views/mjit_instruction.rb.erb
@@ -36,5 +36,5 @@ module RubyVM::MJIT
 % end
   }
 
-  private_constant *constants
+  private_constant(*constants)
 end if RubyVM::MJIT.enabled?