diff --git a/lib/experimental/block-bindings/sources/pattern.php b/lib/experimental/block-bindings/sources/pattern.php
index e521cab2d18283..d015dad405dc23 100644
--- a/lib/experimental/block-bindings/sources/pattern.php
+++ b/lib/experimental/block-bindings/sources/pattern.php
@@ -6,12 +6,12 @@
  */
 
 if ( function_exists( 'register_block_bindings_source' ) ) {
-	$pattern_source_callback = function ( $source_attrs, $block_content, $block, $block_instance ) {
+	$pattern_source_callback = function ( $source_attrs, $block_content, $block, $block_instance, $attribute_name ) {
 		if ( ! _wp_array_get( $block_instance->attributes, array( 'metadata', 'id' ), false ) ) {
 			return null;
 		}
 		$block_id = $block_instance->attributes['metadata']['id'];
-		return _wp_array_get( $block_instance->context, array( 'pattern/overrides', $block_id ), null );
+		return _wp_array_get( $block_instance->context, array( 'pattern/overrides', $block_id, $attribute_name ), null );
 	};
 	register_block_bindings_source(
 		'pattern_attributes',
diff --git a/lib/experimental/blocks.php b/lib/experimental/blocks.php
index 7f57b98754be77..1241853142f006 100644
--- a/lib/experimental/blocks.php
+++ b/lib/experimental/blocks.php
@@ -152,7 +152,7 @@ function process_block_bindings( $block_content, $block, $block_instance ) {
 				} else {
 					$source_args = $binding_source['source']['attributes'];
 				}
-				$source_value = $source_callback( $source_args, $block_content, $block, $block_instance );
+				$source_value = $source_callback( $source_args, $block_content, $block, $block_instance, $binding_attribute );
 				// If the value is null, process next attribute.
 				if ( is_null( $source_value ) ) {
 					continue;