diff --git a/lib/bundler.rb b/lib/bundler.rb
index 70c93282707..ba1cd5573ae 100644
--- a/lib/bundler.rb
+++ b/lib/bundler.rb
@@ -113,8 +113,7 @@ def setup(*groups)
         unloaded = groups - @completed_groups
         # Record groups that are now loaded
         @completed_groups = groups
-        # Load any groups that are not yet loaded
-        unloaded.any? ? load.setup(*unloaded) : load
+        unloaded.any? ? load.setup(*groups) : load
       end
     end
 
diff --git a/spec/runtime/setup_spec.rb b/spec/runtime/setup_spec.rb
index 44d433700c8..34a2c5df135 100644
--- a/spec/runtime/setup_spec.rb
+++ b/spec/runtime/setup_spec.rb
@@ -25,6 +25,7 @@
     before(:each) do
       install_gemfile <<-G
         source "file://#{gem_repo1}"
+        gem "yard"
         gem "rack", :group => :test
       G
     end
@@ -58,6 +59,24 @@
       err.should eq("")
       out.should eq("1.0.0")
     end
+
+    it "leaves :default available if setup is called twice" do
+      ruby <<-RUBY
+        require 'rubygems'
+        require 'bundler'
+        Bundler.setup(:default)
+        Bundler.setup(:default, :test)
+
+        begin
+          require 'yard'
+          puts "WIN"
+        rescue LoadError
+          puts "FAIL"
+        end
+      RUBY
+      err.should eq("")
+      out.should match("WIN")
+    end
   end
 
   it "raises if the Gemfile was not yet installed" do