diff --git a/src/dune_rules/mdx.ml b/src/dune_rules/mdx.ml
index 57884d4cc5f..4f65788121e 100644
--- a/src/dune_rules/mdx.ml
+++ b/src/dune_rules/mdx.ml
@@ -168,8 +168,6 @@ let decode =
        field "libraries" ~default:[]
          (Dune_lang.Syntax.since syntax (0, 2)
          >>> Dune_file.Lib_deps.decode Executable)
-         ~default:[]
-         >>> Dune_file.Lib_deps.decode Executable)
      in
      { loc; version; files; packages; deps; preludes; libraries; enabled_if })
 
diff --git a/test/blackbox-tests/test-cases/mdx-stanza/enabled-if-old-lang-dune.t/run.t b/test/blackbox-tests/test-cases/mdx-stanza/enabled-if-old-lang-dune.t/run.t
index 9c28a38bffd..64364bbabd8 100644
--- a/test/blackbox-tests/test-cases/mdx-stanza/enabled-if-old-lang-dune.t/run.t
+++ b/test/blackbox-tests/test-cases/mdx-stanza/enabled-if-old-lang-dune.t/run.t
@@ -6,4 +6,4 @@
        ^^^^^^^^^^^^^^^^^
   Error: 'enabled_if' is only available since version 2.9 of the dune language.
   Please update your dune-project file to have (lang dune 2.9).
-  [1]
\ No newline at end of file
+  [1]