diff --git a/src/Templates/BlockTemplatesCompatibility.php b/src/Templates/BlockTemplatesCompatibility.php
index 6ec946e9043..8177b8bc7ed 100644
--- a/src/Templates/BlockTemplatesCompatibility.php
+++ b/src/Templates/BlockTemplatesCompatibility.php
@@ -295,7 +295,7 @@ protected function remove_default_hooks() {
 		 */
 		$additional_hook_data = apply_filters( 'woocommerce_blocks_hook_compatibility_additional_data', array() );
 
-		if ( empty( $additional_hook_data ) ) {
+		if ( empty( $additional_hook_data ) || ! is_array( $additional_hook_data ) ) {
 			return;
 		}