Update README.rst
diff --git a/README.rst b/README.rst
index d7a949a..4582491 100644
--- a/README.rst
+++ b/README.rst
@@ -16,6 +16,8 @@
 
 `Documentation <http://fmtlib.net/latest/>`__
 
+Q&A: ask questions at StackOverflow with the tag `fmt <http://stackoverflow.com/questions/tagged/fmt>`_.
+
 Features
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