diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4df9ea9..09a0f87 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@ The format is based on [Keep a Changelog].
 * Apheleia no longer triggers `after-set-visited-file-name-hook`,
   which reduces conflicts with various modes. For example, `lsp-mode`
   will no longer trigger a reconnect every time you save.
+* Fix inconsistent `:type` spec preventing use of `customize-variable`
+  on `apheleia-formatters`.
 
 [#30]: https://github.com/raxod502/apheleia/issues/30
 [#32]: https://github.com/raxod502/apheleia/pull/32
diff --git a/apheleia.el b/apheleia.el
index f93ebf6..9ec573c 100644
--- a/apheleia.el
+++ b/apheleia.el
@@ -475,6 +475,9 @@ commands, lists of strings and symbols, in the format of
           (repeat
            (choice
             (string :tag "Argument")
+            (const :tag "Look for command in node_modules/.bin" npx)
+            (const :tag "Name of file being formatted" filepath)
+            (const :tag "Name of real file used for input" file)
             (const :tag "Name of temporary file used for input" input)
             (const :tag "Name of temporary file used for output" output)))))