diff --git a/docs/reference/index.rst b/docs/reference/index.rst
index 9c5c164f3f..d0c7f69de9 100644
--- a/docs/reference/index.rst
+++ b/docs/reference/index.rst
@@ -25,10 +25,4 @@ implementation and the best practices to use them.
    speed_python.rst
    constrained.rst
    packages.rst
-
-.. only:: port_pyboard
-
-   .. toctree::
-      :maxdepth: 1
-
-      asm_thumb2_index.rst
+   asm_thumb2_index.rst