diff --git a/doc/index.rst b/doc/index.rst
index 29744b37c29f..d2c8d7bd5a93 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -2,6 +2,8 @@
 
 .. title:: Matplotlib: Python plotting
 
+.. module:: matplotlib
+
 Matplotlib: Visualization with Python
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