diff --git a/docs/reference-guides/block-api/block-deprecation.md b/docs/reference-guides/block-api/block-deprecation.md
index e636eb048d6a1..1bb24694749a0 100644
--- a/docs/reference-guides/block-api/block-deprecation.md
+++ b/docs/reference-guides/block-api/block-deprecation.md
@@ -55,11 +55,16 @@ const attributes = {
 		default: 'some random value',
 	},
 };
+const supports = {
+	className: false,
+};
 
 registerBlockType( 'gutenberg/block-with-deprecated-version', {
 	// ... other block properties go here
 
 	attributes,
+	
+	supports,
 
 	save( props ) {
 		return <div>{ props.attributes.text }</div>;
@@ -68,6 +73,8 @@ registerBlockType( 'gutenberg/block-with-deprecated-version', {
 	deprecated: [
 		{
 			attributes,
+			
+			supports,
 
 			save( props ) {
 				return <p>{ props.attributes.text }</p>;
@@ -87,6 +94,9 @@ var el = wp.element.createElement,
 			type: 'string',
 			default: 'some random value',
 		},
+	},
+	supports = {
+		className: false,
 	};
 
 registerBlockType( 'gutenberg/block-with-deprecated-version', {
@@ -94,6 +104,8 @@ registerBlockType( 'gutenberg/block-with-deprecated-version', {
 
 	attributes: attributes,
 
+	supports: supports,
+
 	save: function ( props ) {
 		return el( 'div', {}, props.attributes.text );
 	},