diff --git a/mrbgems/mruby-complex/mrblib/complex.rb b/mrbgems/mruby-complex/mrblib/complex.rb
index cd000a6c6..4c36179cb 100644
--- a/mrbgems/mruby-complex/mrblib/complex.rb
+++ b/mrbgems/mruby-complex/mrblib/complex.rb
@@ -12,7 +12,7 @@ class Complex < Numeric
   end
 
   def +@
-    Complex(real, imaginary)
+    self
   end
 
   def -@