diff --git a/pkgs/development/interpreters/python/cpython/default.nix b/pkgs/development/interpreters/python/cpython/default.nix
index ba97b030524a..ab5960b5ea61 100644
--- a/pkgs/development/interpreters/python/cpython/default.nix
+++ b/pkgs/development/interpreters/python/cpython/default.nix
@@ -658,7 +658,7 @@ in with passthru; stdenv.mkDerivation (finalAttrs: {
     homepage = "https://www.python.org";
     changelog = let
       majorMinor = versions.majorMinor version;
-      dashedVersion = replaceStrings [ "." "a" ] [ "-" "-alpha-" ] version;
+      dashedVersion = replaceStrings [ "." "a" "b" ] [ "-" "-alpha-" "-beta-" ] version;
     in
       if sourceVersion.suffix == "" then
         "https://docs.python.org/release/${version}/whatsnew/changelog.html"