diff --git a/doc/ale-rust.txt b/doc/ale-rust.txt
index ceef12e3..36d69b5e 100644
--- a/doc/ale-rust.txt
+++ b/doc/ale-rust.txt
@@ -288,5 +288,13 @@ g:ale_rust_rustfmt_options                         *g:ale_rust_rustfmt_options*
   This variable can be set to pass additional options to the rustfmt fixer.
 
 
+g:ale_rust_rustfmt_executable                   *g:ale_rust_rustfmt_executable*
+                                                *b:ale_rust_rustfmt_executable*
+  Type: |String|
+  Default: `'rustfmt'`
+
+  This variable can be modified to change the executable path for `rustfmt`.
+
+
 ===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl: