diff --git a/guides/v2.3/security/google-recaptcha.md b/guides/v2.3/security/google-recaptcha.md
index ebccd665e21..3b802144838 100644
--- a/guides/v2.3/security/google-recaptcha.md
+++ b/guides/v2.3/security/google-recaptcha.md
@@ -21,6 +21,9 @@ The Google reCAPTCHA extension is bundled and installed with {{site.data.var.ce}
 
 ## Configure reCAPTCHA
 
+{:.bs-callout .bs-callout-warning}
+Before reCAPTCHA can be configured, ensure that your `PHP.ini` file includes this setting: `allow_url_fopen = 1`. See [Required PHP Settings]({{page.baseurl}}/install-gde/prereq/php-settings.html).
+
 See the Magento Admin User Guide [Open Source](https://docs.magento.com/m2/ce/user_guide/stores/security-google-recaptcha.html) and [Commerce](https://docs.magento.com/m2/ee/user_guide/stores/security-google-recaptcha.html) for configuration options in the Magento Admin and storefront.
 
 ## Troubleshooting