diff --git a/Casks/f/finalshell.rb b/Casks/f/finalshell.rb
index 054c341ddc..fcfd15d85a 100644
--- a/Casks/f/finalshell.rb
+++ b/Casks/f/finalshell.rb
@@ -16,7 +16,7 @@ cask "finalshell" do
 
   depends_on macos: ">= :el_capitan"
 
-  pkg "finalshell_install.pkg"
+  pkg "finalshell_macos_#{arch}.pkg"
 
   uninstall quit:    "finalshellinstall.all",
             pkgutil: [