diff --git a/lib/fog/aws/models/compute/security_group.rb b/lib/fog/aws/models/compute/security_group.rb
index b2af636e8..e94b230d6 100644
--- a/lib/fog/aws/models/compute/security_group.rb
+++ b/lib/fog/aws/models/compute/security_group.rb
@@ -83,8 +83,8 @@ module Fog
           requires_one :name, :group_id
 
           ip_permission = {
-            'FromPort'   => range.min,
-            'ToPort'     => range.max,
+            'FromPort'   => range.begin,
+            'ToPort'     => range.end,
             'IpProtocol' => options[:ip_protocol] || 'tcp'
           }
 
@@ -197,8 +197,8 @@ module Fog
           requires_one :name, :group_id
 
           ip_permission = {
-            'FromPort'   => range.min,
-            'ToPort'     => range.max,
+            'FromPort'   => range.begin,
+            'ToPort'     => range.end,
             'IpProtocol' => options[:ip_protocol] || 'tcp'
           }