diff --git a/website/docs/r/notification_channel.html.markdown b/website/docs/r/notification_channel.html.markdown
index f501fe83f..53a52c1e2 100644
--- a/website/docs/r/notification_channel.html.markdown
+++ b/website/docs/r/notification_channel.html.markdown
@@ -77,8 +77,10 @@ Each notification channel type supports a specific set of arguments for the `pro
   * `email` - (Required) Specifies the user email for integrating with Pagerduty.
   * `customDetails` - (Optional) Free text that *replaces* the content of the alert.
 * `SLACK`
-  * `channelId` - (Required) Specifies the Slack channel id. This can be found in slack browser via the url. Example - https://app.slack.com/client/\<UserId>/\<ChannelId>.
-  * `customDetailsSlack` - (Optional) A map of key/value pairs that represents the slack custom details. Must be compatible with Slack's blocks api. 
+  * `channelId` - (Optional) Specifies the Slack channel id. This can be found in slack browser via the url. Example - https://app.slack.com/client/\<UserId>/\<ChannelId>.
+  * `channelName` - (Optional) Specifies the Slack channel name. 
+  * `customDetailsSlack` - (Optional) A map of key/value pairs that represents the slack custom details. Must be compatible with Slack's blocks api. \
+  **Note**: The `SLACK` properties must include either channelId or channelName (not both).
 
 ## Attributes Reference