diff --git a/templates/main.js b/templates/main.js
index c48a6ed3..8684e166 100755
--- a/templates/main.js
+++ b/templates/main.js
@@ -246,6 +246,8 @@ function getCookie(cookie_name) {
 {% if config.hcaptcha or config.turnstile %} // If any captcha
 // Global captcha object. Assigned by `onCaptchaLoad()`.
 var captcha_renderer = null;
+// Captcha widget id of the post form.
+var postCaptchaId = null;
 
 {% if config.hcaptcha %} // If hcaptcha
 function onCaptchaLoadHcaptcha() {
@@ -256,7 +258,9 @@ function onCaptchaLoadHcaptcha() {
 				callback: params['on-success'],
 			}),
 			remove: (widgetId) => { /* Not supported */ },
-			reset: (widgetId) => hcaptcha.reset(widgetId)
+			reset: (widgetId) => hcaptcha.reset(widgetId),
+			hasResponse: (widgetId) => !!hcaptcha.getResponse(widgetId),
+			execute: (widgetId) => hcaptcha.execute(widgetId)
 		};
 
 		onCaptchaLoad(renderer);
@@ -291,7 +295,9 @@ function onCaptchaLoadTurnstile(action) {
 				return widgetId;
 			},
 			remove: (widgetId) => turnstile.remove(widgetId),
-			reset: (widgetId) => turnstile.reset(widgetId)
+			reset: (widgetId) => turnstile.reset(widgetId),
+			hasResponse: (widgetId) => !!turnstile.getResponse(widgetId),
+			execute: (widgetId) => turnstile.execute(widgetId)
 		};
 
 		onCaptchaLoad(renderer);
@@ -313,6 +319,7 @@ function onCaptchaLoad(renderer) {
 	if (widgetId === null) {
 		console.error('Could not render captcha!');
 	}
+	postCaptchaId = widgetId;
 	document.addEventListener('afterdopost', function(e) {
 		// User posted! Reset the captcha.
 		renderer.reset(widgetId);
@@ -390,6 +397,11 @@ function doPost(form) {
 	saved[document.location] = form.elements['body'].value;
 	sessionStorage.body = JSON.stringify(saved);
 
+	if (captcha_renderer && postCaptchaId && !captcha_renderer.hasResponse(postCaptchaId)) {
+		captcha_renderer.execute(postCaptchaId);
+		return false;
+	}
+
 	// Needs to be delayed by at least 1 frame, otherwise it may reset the form (read captcha) fields before they're sent.
 	setTimeout(() => document.dispatchEvent(new Event('afterdopost')));
 	return form.elements['body'].value != "" || (form.elements['file'] && form.elements['file'].value != "") || (form.elements.file_url && form.elements['file_url'].value != "");