diff --git a/ibis/expr/types/generic.py b/ibis/expr/types/generic.py
index 3eb7c6418daa..be216601e366 100644
--- a/ibis/expr/types/generic.py
+++ b/ibis/expr/types/generic.py
@@ -392,9 +392,9 @@ def between(
         Parameters
         ----------
         lower
-            Lower bound
+            Lower bound, inclusive
         upper
-            Upper bound
+            Upper bound, inclusive
 
         Returns
         -------