diff --git a/lib/rubygems/basic_specification.rb b/lib/rubygems/basic_specification.rb
index d344bc5f3d..cb6931b974 100644
--- a/lib/rubygems/basic_specification.rb
+++ b/lib/rubygems/basic_specification.rb
@@ -131,9 +131,9 @@ class Gem::BasicSpecification
 
   def full_name
     if platform == Gem::Platform::RUBY || platform.nil?
-      +"#{name}-#{version}"
+      "#{name}-#{version}"
     else
-      +"#{name}-#{version}-#{platform}"
+      "#{name}-#{version}-#{platform}"
     end
   end