diff --git a/panel/widgets/tables.py b/panel/widgets/tables.py
index 7a62e441f6..041f733226 100644
--- a/panel/widgets/tables.py
+++ b/panel/widgets/tables.py
@@ -1203,7 +1203,7 @@ class Tabulator(BaseTable):
     row_height = param.Integer(default=30, doc="""
         The height of each table row.""")
 
-    selection = _ListValidateWithCallable(default=[], doc="""
+    selection: list[int] = _ListValidateWithCallable(default=[], doc="""
         The currently selected rows of the table. It validates
         its values against 'selectable_rows' if used.""")