diff --git a/templates/single-product/add-to-cart/variable.php b/templates/single-product/add-to-cart/variable.php
index eddaa17fab3..ea6f2de4de0 100644
--- a/templates/single-product/add-to-cart/variable.php
+++ b/templates/single-product/add-to-cart/variable.php
@@ -25,7 +25,7 @@ $attribute_keys = array_keys( $attributes );
 
 do_action( 'woocommerce_before_add_to_cart_form' ); ?>
 
-<form class="variations_form cart" method="post" enctype='multipart/form-data' data-product_id="<?php echo absint( $product->id ); ?>" data-product_variations="<?php echo htmlspecialchars( json_encode( $available_variations ) ) ?>">
+<form class="variations_form cart" method="post" enctype='multipart/form-data' data-product_id="<?php echo absint( $product->id ); ?>" data-product_variations="<?php echo htmlspecialchars( wp_json_encode( $available_variations ) ) ?>">
 	<?php do_action( 'woocommerce_before_variations_form' ); ?>
 
 	<?php if ( empty( $available_variations ) && false !== $available_variations ) : ?>