diff --git a/Documentation/locking/mutex-design.rst b/Documentation/locking/mutex-design.rst
index 4d8236b81fa5..8f3e9a5141f9 100644
--- a/Documentation/locking/mutex-design.rst
+++ b/Documentation/locking/mutex-design.rst
@@ -18,7 +18,7 @@ as an alternative to these. This new data structure provided a number
 of advantages, including simpler interfaces, and at that time smaller
 code (see Disadvantages).
 
-[1] http://lwn.net/Articles/164802/
+[1] https://lwn.net/Articles/164802/
 
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