diff --git a/plugins/woocommerce/changelog/fix-38444-unsupported-operands b/plugins/woocommerce/changelog/fix-38444-unsupported-operands
new file mode 100644
index 00000000000..721eece20c1
--- /dev/null
+++ b/plugins/woocommerce/changelog/fix-38444-unsupported-operands
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fix
+
+fix string + string for PHP 8.X
diff --git a/plugins/woocommerce/includes/abstracts/abstract-wc-order.php b/plugins/woocommerce/includes/abstracts/abstract-wc-order.php
index 1b66647f5e3..c311ccd1d2e 100644
--- a/plugins/woocommerce/includes/abstracts/abstract-wc-order.php
+++ b/plugins/woocommerce/includes/abstracts/abstract-wc-order.php
@@ -489,9 +489,9 @@ abstract class WC_Abstract_Order extends WC_Abstract_Legacy_Order {
 	 */
 	public function get_total_discount( $ex_tax = true ) {
 		if ( $ex_tax ) {
-			$total_discount = $this->get_discount_total();
+			$total_discount = (float) $this->get_discount_total();
 		} else {
-			$total_discount = $this->get_discount_total() + $this->get_discount_tax();
+			$total_discount = (float) $this->get_discount_total() + (float) $this->get_discount_tax();
 		}
 		return apply_filters( 'woocommerce_order_get_total_discount', NumberUtil::round( $total_discount, WC_ROUNDING_PRECISION ), $this );
 	}
@@ -2176,7 +2176,7 @@ abstract class WC_Abstract_Order extends WC_Abstract_Legacy_Order {
 			} else {
 
 				// Show shipping including tax.
-				$shipping = wc_price( $this->get_shipping_total() + $this->get_shipping_tax(), array( 'currency' => $this->get_currency() ) );
+				$shipping = wc_price( (float) $this->get_shipping_total() + (float) $this->get_shipping_tax(), array( 'currency' => $this->get_currency() ) );
 
 				if ( (float) $this->get_shipping_tax() > 0 && ! $this->get_prices_include_tax() ) {
 					$shipping .= apply_filters( 'woocommerce_order_shipping_to_display_tax_label', '&nbsp;<small class="tax_label">' . WC()->countries->inc_tax_or_vat() . '</small>', $this, $tax_display );