diff --git a/modules/programs/fish.nix b/modules/programs/fish.nix
index 1fbb9e071..7eda6eb6b 100644
--- a/modules/programs/fish.nix
+++ b/modules/programs/fish.nix
@@ -285,6 +285,9 @@ in {
     {
       home.packages = [ cfg.package ];
 
+      # Support completion for `man` by building a cache for `apropos`.
+      programs.man.generateCaches = mkDefault true;
+
       xdg.dataFile."fish/home-manager_generated_completions".source = let
         # paths later in the list will overwrite those already linked
         destructiveSymlinkJoin = args_@{ name, paths, preferLocalBuild ? true