diff --git a/src/wp-includes/blocks.php b/src/wp-includes/blocks.php
index dcb899c9e5..b7b806fd47 100644
--- a/src/wp-includes/blocks.php
+++ b/src/wp-includes/blocks.php
@@ -784,7 +784,7 @@ function get_hooked_block_markup( $hooked_block, $hooked_block_type, &$anchor_bl
 		$anchor_block['attrs']['metadata']['ignoredHookedBlocks'] = array();
 	}
 
-	if ( in_array( $hooked_block_type, $anchor_block['attrs']['metadata']['ignoredHookedBlocks'] ) ) {
+	if ( in_array( $hooked_block_type, $anchor_block['attrs']['metadata']['ignoredHookedBlocks'], true ) ) {
 		return '';
 	}