diff --git a/docs/reference/systems.rst b/docs/reference/systems.rst
index 09e62e0f..297f63d1 100644
--- a/docs/reference/systems.rst
+++ b/docs/reference/systems.rst
@@ -19,13 +19,3 @@ File
 
 .. 
    doxygenfile:: si/length.h
-
-Group
------
-
-.. 
-   doxygengroup:: si_length
-    :content-only:
-    :members:
-    :undoc-members:
-    :outline: