diff --git a/website/source/docs/configuration/interpolation.html.md b/website/source/docs/configuration/interpolation.html.md
index aef902d6e..0a1814665 100644
--- a/website/source/docs/configuration/interpolation.html.md
+++ b/website/source/docs/configuration/interpolation.html.md
@@ -61,6 +61,13 @@ attribute set, you can access individual attributes with a zero-based
 index, such as `${aws_instance.web.0.id}`. You can also use the splat
 syntax to get a list of all the attributes: `${aws_instance.web.*.id}`.
 
+#### Attributes of a data source
+
+The syntax is `data.TYPE.NAME.ATTRIBUTE`. For example. `${data.aws_ami.ubuntu.id}` will interpolate the `id` attribute from the `aws_ami` [data source](/docs/configuration/data-sources.html) named `ubuntu`. If the data source has a `count`
+attribute set, you can access individual attributes with a zero-based
+index, such as `${data.aws_subnet.example.0.cidr_block}`. You can also use the splat
+syntax to get a list of all the attributes: `${data.aws_subnet.example.*.cidr_block}`.
+
 #### Outputs from a module
 
 The syntax is `MODULE.NAME.OUTPUT`. For example `${module.foo.bar}` will