diff --git a/mrbgems/mruby-method/src/method.c b/mrbgems/mruby-method/src/method.c
index c8f133a30..18560d159 100644
--- a/mrbgems/mruby-method/src/method.c
+++ b/mrbgems/mruby-method/src/method.c
@@ -423,7 +423,14 @@ method_to_s(mrb_state *mrb, mrb_value self)
     mrb_str_cat_lit(mrb, str, ")#");
     mrb_str_concat(mrb, str, name);
   }
- finish:
+ finish:;
+  mrb_value loc = method_source_location(mrb, self);
+  if (mrb_array_p(loc) && RARRAY_LEN(loc) == 2) {
+    mrb_str_cat_lit(mrb, str, " ");
+    mrb_str_concat(mrb, str, RARRAY_PTR(loc)[0]);
+    mrb_str_cat_lit(mrb, str, ":");
+    mrb_str_concat(mrb, str, RARRAY_PTR(loc)[1]);
+  }
   mrb_str_cat_lit(mrb, str, ">");
   return str;
 }
diff --git a/mrbgems/mruby-method/test/method.rb b/mrbgems/mruby-method/test/method.rb
index 9089c96d6..8966ee085 100644
--- a/mrbgems/mruby-method/test/method.rb
+++ b/mrbgems/mruby-method/test/method.rb
@@ -230,14 +230,14 @@ assert 'to_s' do
   o = Object.new
   def o.foo; end
   m = o.method(:foo)
-  assert_equal("#<UnboundMethod: #{ class << o; self; end.inspect }#foo>", m.unbind.inspect)
+  assert_match("#<UnboundMethod: #{ class << o; self; end.inspect }#foo*>", m.unbind.inspect)
 
   c = Class.new
   c.class_eval { def foo; end; }
   m = c.new.method(:foo)
-  assert_equal("#<Method: #{ c.inspect }#foo>", m.inspect)
+  assert_match("#<Method: #{ c.inspect }#foo*>", m.inspect)
   m = c.instance_method(:foo)
-  assert_equal("#<UnboundMethod: #{ c.inspect }#foo>", m.inspect)
+  assert_match("#<UnboundMethod: #{ c.inspect }#foo*>", m.inspect)
 end
 
 assert 'owner' do