diff --git a/doc/ale-c.txt b/doc/ale-c.txt
index c9eb79db..7a6e71ea 100644
--- a/doc/ale-c.txt
+++ b/doc/ale-c.txt
@@ -59,6 +59,18 @@ g:ale_c_parse_makefile                                 *g:ale_c_parse_makefile*
   build flags to use for different files.
 
 
+
+===============================================================================
+astyle                                                           *ale-c-astyle*
+
+g:ale_c_astyle_executable                           *g:ale_c_astyle_executable*
+                                                    *b:ale_c_astyle_executable*
+  Type: |String|
+  Default: `'astyle'`
+
+  This variable can be changed to use a different executable for astyle.
+
+
 ===============================================================================
 clang                                                             *ale-c-clang*