diff --git a/pylsp/plugins/references.py b/pylsp/plugins/references.py
index cfdf86b5..fadf1de8 100644
--- a/pylsp/plugins/references.py
+++ b/pylsp/plugins/references.py
@@ -8,7 +8,7 @@
 
 
 @hookimpl
-def pylsp_references(document, position, exclude_declaration=False):
+def pylsp_references(document, position, exclude_declaration):
     code_position = _utils.position_to_jedi_linecolumn(document, position)
     usages = document.jedi_script().get_references(**code_position)