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-rw-r--r--lib/mutex_m.rb6
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/mutex_m.rb b/lib/mutex_m.rb
index 19fe85b81c..555331edcc 100644
--- a/lib/mutex_m.rb
+++ b/lib/mutex_m.rb
@@ -25,10 +25,14 @@
# obj.extend Mutex_m
#
# Or mixin Mutex_m into your module to your class inherit Mutex instance
-# methods.
+# methods ---remember to call super() in your class initialize method.
#
# class Foo
# include Mutex_m
+# def initialize ...
+# ...
+# super()
+# end
# # ...
# end
# obj = Foo.new