diff --git a/includes/wc-template-functions.php b/includes/wc-template-functions.php
index e03b084b942..aff8a276672 100644
--- a/includes/wc-template-functions.php
+++ b/includes/wc-template-functions.php
@@ -1426,6 +1426,7 @@ function wc_get_gallery_image_html( $attachment_id, $main_image = false ) {
 	$full_size         = apply_filters( 'woocommerce_gallery_full_size', apply_filters( 'woocommerce_product_thumbnails_large_size', 'full' ) );
 	$thumbnail_src     = wp_get_attachment_image_src( $attachment_id, $thumbnail_size );
 	$full_src          = wp_get_attachment_image_src( $attachment_id, $full_size );
+	$alt_text          = trim( wp_strip_all_tags( get_post_meta( $attachment_id, '_wp_attachment_image_alt', true ) ) );
 	$image             = wp_get_attachment_image(
 		$attachment_id,
 		$image_size,
@@ -1447,7 +1448,7 @@ function wc_get_gallery_image_html( $attachment_id, $main_image = false ) {
 		)
 	);
 
-	return '<div data-thumb="' . esc_url( $thumbnail_src[0] ) . '" class="woocommerce-product-gallery__image"><a href="' . esc_url( $full_src[0] ) . '">' . $image . '</a></div>';
+	return '<div data-thumb="' . esc_url( $thumbnail_src[0] ) . '" data-thumb-alt="' . esc_attr( $alt_text ) . '" class="woocommerce-product-gallery__image"><a href="' . esc_url( $full_src[0] ) . '">' . $image . '</a></div>';
 }
 
 if ( ! function_exists( 'woocommerce_output_product_data_tabs' ) ) {