diff --git a/lib/bundler/cli/install.rb b/lib/bundler/cli/install.rb
index ed21485170..068046fdc3 100644
--- a/lib/bundler/cli/install.rb
+++ b/lib/bundler/cli/install.rb
@@ -164,7 +164,7 @@ module Bundler
       # need to nil them out first to get around validation for backwards compatibility
       Bundler.settings.set_command_option :without, nil
       Bundler.settings.set_command_option :with,    nil
-      Bundler.settings.set_command_option :without, without - with
+      Bundler.settings.set_command_option :without, without
       Bundler.settings.set_command_option :with,    with
     end