lib/usps_flags.rb in usps_flags-0.3.15 vs lib/usps_flags.rb in usps_flags-0.3.16

@@ -38,10 +38,10 @@
     @configuration ||= USPSFlags::Config.new
   end
 
   # Configuration constructor.
   def self.configure
-    yield(configuration)
+    yield(configuration) if block_given?
     self.ensure_directories
     @configuration
   end
 
   # Ensures the directory structure exists.