diff --git a/builds/4chan-X.user.js b/builds/4chan-X.user.js
index 9d75dfe1b..f845c5ac4 100644
--- a/builds/4chan-X.user.js
+++ b/builds/4chan-X.user.js
@@ -6383,6 +6383,8 @@
         if (/captcha|verification/i.test(err.textContent) || err === 'Connection error with sys.4chan.org.') {
           if (/mistyped/i.test(err.textContent)) {
             err = 'You seem to have mistyped the CAPTCHA.';
+          } else if (/expired/i.test(err.textContent)) {
+            err = 'This CAPTCHA is no longer valid because it has expired.';
           }
           QR.cooldown.auto = QR.captcha.isEnabled ? !!QR.captcha.captchas.length : err === 'Connection error with sys.4chan.org.' ? true : false;
           QR.cooldown.set({
diff --git a/builds/crx/script.js b/builds/crx/script.js
index 8a90ea2a1..207a6b88f 100644
--- a/builds/crx/script.js
+++ b/builds/crx/script.js
@@ -6408,6 +6408,8 @@
         if (/captcha|verification/i.test(err.textContent) || err === 'Connection error with sys.4chan.org.') {
           if (/mistyped/i.test(err.textContent)) {
             err = 'You seem to have mistyped the CAPTCHA.';
+          } else if (/expired/i.test(err.textContent)) {
+            err = 'This CAPTCHA is no longer valid because it has expired.';
           }
           QR.cooldown.auto = QR.captcha.isEnabled ? !!QR.captcha.captchas.length : err === 'Connection error with sys.4chan.org.' ? true : false;
           QR.cooldown.set({
diff --git a/src/Posting/QR.coffee b/src/Posting/QR.coffee
index 5bfca34a4..a05f72c2c 100644
--- a/src/Posting/QR.coffee
+++ b/src/Posting/QR.coffee
@@ -726,6 +726,8 @@ QR =
         # Remove the obnoxious 4chan Pass ad.
         if /mistyped/i.test err.textContent
           err = 'You seem to have mistyped the CAPTCHA.'
+        else if /expired/i.test err.textContent
+          err = 'This CAPTCHA is no longer valid because it has expired.'
         # Enable auto-post if we have some cached captchas.
         QR.cooldown.auto = if QR.captcha.isEnabled
           !!QR.captcha.captchas.length