diff --git a/app/code/Magento/Catalog/Pricing/Price/CalculateCustomOptionCatalogRule.php b/app/code/Magento/Catalog/Pricing/Price/CalculateCustomOptionCatalogRule.php
index 1090867aa51a5..4462afcb03738 100644
--- a/app/code/Magento/Catalog/Pricing/Price/CalculateCustomOptionCatalogRule.php
+++ b/app/code/Magento/Catalog/Pricing/Price/CalculateCustomOptionCatalogRule.php
@@ -59,7 +59,7 @@ public function execute(
             $product
         );
         // Apply catalog price rules to product options only if catalog price rules are applied to product.
-        if ($catalogRulePrice < $regularPrice) {
+        if ($catalogRulePrice < $regularPrice || ($catalogRulePrice == 0.00 && $regularPrice == 0.00)) {
             $optionPrice = $this->getOptionPriceWithoutPriceRule($optionPriceValue, $isPercent, $regularPrice);
             $totalCatalogRulePrice = $this->priceModifier->modifyPrice(
                 $regularPrice + $optionPrice,