diff --git a/docs/reference-guides/core-blocks.md b/docs/reference-guides/core-blocks.md
index bee68530eeb239..ab6bb52b6b3b2a 100644
--- a/docs/reference-guides/core-blocks.md
+++ b/docs/reference-guides/core-blocks.md
@@ -42,7 +42,7 @@ Create and save content to reuse across your site. Update the pattern, and the c
 -	**Name:** core/block
 -	**Category:** reusable
 -	**Supports:** ~~customClassName~~, ~~html~~, ~~inserter~~, ~~renaming~~
--	**Attributes:** ref
+-	**Attributes:** overrides, ref
 
 ## Button
 
diff --git a/packages/block-library/src/block/block.json b/packages/block-library/src/block/block.json
index aeccdbfc1051db..b30c865e57a7f6 100644
--- a/packages/block-library/src/block/block.json
+++ b/packages/block-library/src/block/block.json
@@ -10,6 +10,9 @@
 	"attributes": {
 		"ref": {
 			"type": "number"
+		},
+		"overrides": {
+			"type": "object"
 		}
 	},
 	"supports": {
diff --git a/packages/block-library/src/block/index.php b/packages/block-library/src/block/index.php
index fb80c64f1e3405..444001fa498595 100644
--- a/packages/block-library/src/block/index.php
+++ b/packages/block-library/src/block/index.php
@@ -83,28 +83,3 @@ function register_block_core_block() {
 	);
 }
 add_action( 'init', 'register_block_core_block' );
-
-$gutenberg_experiments = get_option( 'gutenberg-experiments' );
-if ( $gutenberg_experiments && array_key_exists( 'gutenberg-pattern-partial-syncing', $gutenberg_experiments ) ) {
-	/**
-	 * Registers the overrides attribute for core/block.
-	 *
-	 * @param array  $args       Array of arguments for registering a block type.
-	 * @param string $block_name Block name including namespace.
-	 * @return array $args
-	 */
-	function register_block_core_block_args( $args, $block_name ) {
-		if ( 'core/block' === $block_name ) {
-			$args['attributes'] = array_merge(
-				$args['attributes'],
-				array(
-					'overrides' => array(
-						'type' => 'object',
-					),
-				)
-			);
-		}
-		return $args;
-	}
-	add_filter( 'register_block_type_args', 'register_block_core_block_args', 10, 2 );
-}