diff --git a/Doc/whatsnew/3.11.rst b/Doc/whatsnew/3.11.rst
index 9744051ede6..c717aad9c87 100644
--- a/Doc/whatsnew/3.11.rst
+++ b/Doc/whatsnew/3.11.rst
@@ -618,6 +618,9 @@ Changes in the Python API
 Build Changes
 =============
 
+* Building Python now requires a C11 compiler without optional C11 features.
+  (Contributed by Victor Stinner in :issue:`46656`.)
+
 * CPython can now be built with the ThinLTO option via ``--with-lto=thin``.
   (Contributed by Dong-hee Na and Brett Holman in :issue:`44340`.)
 
diff --git a/Misc/NEWS.d/next/Build/2022-02-25-00-51-16.bpo-46656.MD783M.rst b/Misc/NEWS.d/next/Build/2022-02-25-00-51-16.bpo-46656.MD783M.rst
new file mode 100644
index 00000000000..f5b789b23ee
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2022-02-25-00-51-16.bpo-46656.MD783M.rst
@@ -0,0 +1,2 @@
+Building Python now requires a C11 compiler without optional C11 features.
+Patch by Victor Stinner.