1 files changed, 4 insertions, 0 deletions
diff --git a/lib/rubygems/dependency_resolver/installed_specification.rb b/lib/rubygems/dependency_resolver/installed_specification.rb
index af167572bf..ca20ace61e 100644
--- a/lib/rubygems/dependency_resolver/installed_specification.rb
+++ b/lib/rubygems/dependency_resolver/installed_specification.rb
@@ -26,6 +26,10 @@ class Gem::DependencyResolver::InstalledSpecification
     @spec.name
   end
 
+  def platform
+    @spec.platform
+  end
+
   def source
     @source ||= Gem::Source::Installed.new
   end