diff --git a/docs/storage-drivers/s3.md b/docs/storage-drivers/s3.md
index 7e00e878..16b5279f 100644
--- a/docs/storage-drivers/s3.md
+++ b/docs/storage-drivers/s3.md
@@ -20,10 +20,10 @@ Amazon S3 or S3 compatible services for object storage.
       <code>accesskey</code>
     </td>
     <td>
-      yes
+      no
     </td>
     <td>
-      Your AWS Access Key.
+      Your AWS Access Key. If you use [IAM roles](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html), omit to fetch temporary credentials from IAM.
     </td>
   </tr>
   <tr>
@@ -31,10 +31,10 @@ Amazon S3 or S3 compatible services for object storage.
       <code>secretkey</code>
     </td>
     <td>
-      yes
+      no
     </td>
     <td>
-      Your AWS Secret Key.
+      Your AWS Secret Key. If you use [IAM roles](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html), omit to fetch temporary credentials from IAM.
     </td>
   </tr>
   <tr>
@@ -160,7 +160,10 @@ Amazon S3 or S3 compatible services for object storage.
 
 `secretkey`: Your aws secret key.
 
-**Note** You can provide empty strings for your access and secret keys if you plan on running the driver on an ec2 instance and will handle authentication with the instance's credentials.
+> **Note** You can provide empty strings for your access and secret keys to run the driver
+> on an ec2 instance and will handle authentication with the instance's credentials. If you
+> use [IAM roles](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html),
+> omit these keys to fetch temporary credentials from IAM.
 
 `region`: The name of the aws region in which you would like to store objects (for example `us-east-1`). For a list of regions, you can look at http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html