diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index e6e8e591aa..19b4256fc5 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -936,7 +936,7 @@ charclass({string})                                                *charclass()*
 		The character class is one of:
 			0	blank
 			1	punctuation
-			2	word character
+			2	word character (depends on 'iskeyword')
 			3	emoji
 			other	specific Unicode class
 		The class is used in patterns and word motions.
diff --git a/runtime/lua/vim/_meta/vimfn.lua b/runtime/lua/vim/_meta/vimfn.lua
index a751783c8f..7548d1beb2 100644
--- a/runtime/lua/vim/_meta/vimfn.lua
+++ b/runtime/lua/vim/_meta/vimfn.lua
@@ -809,7 +809,7 @@ function vim.fn.char2nr(string, utf8) end
 --- The character class is one of:
 ---   0  blank
 ---   1  punctuation
----   2  word character
+---   2  word character (depends on 'iskeyword')
 ---   3  emoji
 ---   other  specific Unicode class
 --- The class is used in patterns and word motions.
diff --git a/src/nvim/eval.lua b/src/nvim/eval.lua
index 34045c7c9d..870eb17b9e 100644
--- a/src/nvim/eval.lua
+++ b/src/nvim/eval.lua
@@ -1111,7 +1111,7 @@ M.funcs = {
       The character class is one of:
       	0	blank
       	1	punctuation
-      	2	word character
+      	2	word character (depends on 'iskeyword')
       	3	emoji
       	other	specific Unicode class
       The class is used in patterns and word motions.