diff --git a/pkgs/applications/version-management/git-and-tools/git-ignore/default.nix b/pkgs/applications/version-management/git-and-tools/git-ignore/default.nix
index 0cbda8733d3f..98da70a274e4 100644
--- a/pkgs/applications/version-management/git-and-tools/git-ignore/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-ignore/default.nix
@@ -23,6 +23,8 @@ buildRustPackage rec {
 
   postInstall = ''
     installManPage assets/git-ignore.1
+    # There's also .elv and .ps1 completion files but I don't know where to install those
+    installShellCompletion assets/git-ignore.{bash,fish} --zsh assets/_git-ignore
   '';
 
   meta = with lib; {