diff --git a/Doc/using/configure.rst b/Doc/using/configure.rst
index f3de308a997d65..aa2edd5dd7f29d 100644
--- a/Doc/using/configure.rst
+++ b/Doc/using/configure.rst
@@ -29,6 +29,9 @@ Features and minimum versions required to build CPython:
* Tcl/Tk 8.5.12 for the :mod:`tkinter` module.
+* `libmpdec
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