diff --git a/docs/submodules/comparison.rst b/docs/submodules/comparison.rst
index 4f9c61b..0b72d76 100644
--- a/docs/submodules/comparison.rst
+++ b/docs/submodules/comparison.rst
@@ -2,6 +2,8 @@
 lvsfunc.comparison
 ==================
 
+.. _filters:
+
 Comparison and analysis functions and wrappers.
 
 .. autosummary::