diff --git a/lib/bundler/definition.rb b/lib/bundler/definition.rb
index 491d4f11cb..6f51168bcc 100644
--- a/lib/bundler/definition.rb
+++ b/lib/bundler/definition.rb
@@ -760,7 +760,7 @@ module Bundler
         end
       end
 
-      @platforms = result.add_extra_platforms!(platforms) if should_add_extra_platforms?
+      result.add_extra_platforms!(platforms) if should_add_extra_platforms?
 
       SpecSet.new(result.for(dependencies, @platforms | [Gem::Platform::RUBY]))
     end
diff --git a/lib/bundler/spec_set.rb b/lib/bundler/spec_set.rb
index 8d75c29420..1de31da4cf 100644
--- a/lib/bundler/spec_set.rb
+++ b/lib/bundler/spec_set.rb
@@ -48,7 +48,10 @@ module Bundler
     end
 
     def add_extra_platforms!(platforms)
-      return platforms.concat([Gem::Platform::RUBY]).uniq if @specs.empty?
+      if @specs.empty?
+        platforms.concat([Gem::Platform::RUBY]).uniq
+        return
+      end
 
       new_platforms = all_platforms.select do |platform|
         next if platforms.include?(platform)
@@ -56,14 +59,12 @@ module Bundler
 
         complete_platform(platform)
       end
-      return platforms if new_platforms.empty?
+      return if new_platforms.empty?
 
       platforms.concat(new_platforms)
 
       less_specific_platform = new_platforms.find {|platform| platform != Gem::Platform::RUBY && Bundler.local_platform === platform && platform === Bundler.local_platform }
       platforms.delete(Bundler.local_platform) if less_specific_platform
-
-      platforms
     end
 
     def validate_deps(s)