diff --git a/packages/block-library/src/block/index.php b/packages/block-library/src/block/index.php
index bc33929ac517a..46065e155b0be 100644
--- a/packages/block-library/src/block/index.php
+++ b/packages/block-library/src/block/index.php
@@ -17,7 +17,8 @@ function render_block_core_block( $attributes ) {
 		return '';
 	}
 
-	$reusable_block = get_post( $attributes['ref'] );
+	$reusable_block_id = apply_filters( 'gutenberg_reusable_block_id', $attributes['ref'] );
+	$reusable_block    = get_post( $reusable_block_id );
 	if ( ! $reusable_block || 'wp_block' !== $reusable_block->post_type ) {
 		return '';
 	}