diff --git a/lib/fog/vsphere/compute.rb b/lib/fog/vsphere/compute.rb
index 508dc02..175f85a 100644
--- a/lib/fog/vsphere/compute.rb
+++ b/lib/fog/vsphere/compute.rb
@@ -347,7 +347,7 @@ def managed_obj_id(obj)
         end
 
         def is_uuid?(id)
-          /[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}/.match?(id)
+          !(id =~ /[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}/).nil?
         end
       end