diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 572ca41..b903b38 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.1.  Last change: 2025 Mar 24
+*builtin.txt*	For Vim version 9.1.  Last change: 2025 Mar 26
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -8336,13 +8336,14 @@
 		converted to Vim data structures.
 		If a {locals} |Dictionary| is given, it defines set of local
 		variables available in the expression. The keys are variable
-		names and the values are the variable values. |Dictionary| and
-		|List| values are referenced, and may be updated by the
-		expression (as if |python-bindeval| was used).
+		names and the values are the variable values. |Dictionary|,
+		|List| and |Tuple| values are referenced, and may be updated
+		by the expression (as if |python-bindeval| was used).
 		Numbers and strings are returned as they are (strings are
 		copied though, Unicode strings are additionally converted to
 		'encoding').
 		Lists are represented as Vim |List| type.
+		Tuples are represented as Vim |Tuple| type.
 		Dictionaries are represented as Vim |Dictionary| type with
 		keys converted to strings.
 		Note that in a `:def` function local variables are not visible
@@ -8364,6 +8365,7 @@
 		Numbers and strings are returned as they are (strings are
 		copied though).
 		Lists are represented as Vim |List| type.
+		Tuples are represented as Vim |Tuple| type.
 		Dictionaries are represented as Vim |Dictionary| type,
 		non-string keys result in error.
 		Note that in a `:def` function local variables are not visible