diff --git a/doc_src/index.hdr.in b/doc_src/index.hdr.in
index 7f2b30c49..bba0290b0 100644
--- a/doc_src/index.hdr.in
+++ b/doc_src/index.hdr.in
@@ -863,6 +863,8 @@ The following variables are available to change the highlighting colors in fish:
 
 - `fish_color_cwd`, the color used for the current working directory in the default prompt
 
+- `fish_color_autosuggestion`, the color used for autosuggestions
+
 Additionally, the following variables are available to change the highlighting in the completion pager:
 
 - `fish_pager_color_prefix`, the color of the prefix string, i.e. the string that is to be completed