diff --git a/includes/abstracts/abstract-wc-product.php b/includes/abstracts/abstract-wc-product.php
index ebb0a052f99..a6f2cd5bb16 100644
--- a/includes/abstracts/abstract-wc-product.php
+++ b/includes/abstracts/abstract-wc-product.php
@@ -1104,7 +1104,7 @@ class WC_Product extends WC_Abstract_Legacy_Product {
 		$attributes = array_fill_keys( array_keys( $this->get_attributes( 'edit' ) ), null );
 		foreach ( $raw_attributes as $attribute ) {
 			if ( is_a( $attribute, 'WC_Product_Attribute' ) ) {
-				$attributes[ sanitize_text_field( $attribute->get_name() ) ] = $attribute;
+				$attributes[ sanitize_title( $attribute->get_name() ) ] = $attribute;
 			}
 		}
 
diff --git a/includes/class-wc-ajax.php b/includes/class-wc-ajax.php
index bd6907d02c5..51500c6c916 100644
--- a/includes/class-wc-ajax.php
+++ b/includes/class-wc-ajax.php
@@ -631,7 +631,7 @@ class WC_AJAX {
 			$i          = -1;
 
 			foreach ( $data['attribute_names'] as $attribute_name ) {
-				$attribute = isset( $attributes[ $attribute_name ] ) ? $attributes[ $attribute_name ] : false;
+				$attribute = isset( $attributes[ sanitize_title( $attribute_name ) ] ) ? $attributes[ sanitize_title( $attribute_name ) ] : false;
 				if ( ! $attribute ) {
 					continue;
 				}