diff --git a/news/234.bugfix b/news/234.bugfix
new file mode 100644
index 00000000..8bfc3559
--- /dev/null
+++ b/news/234.bugfix
@@ -0,0 +1 @@
+Apply validation for all captchas. @ksuess
\ No newline at end of file
diff --git a/plone/app/discussion/browser/validator.py b/plone/app/discussion/browser/validator.py
index 734b6c2d..18db7d02 100644
--- a/plone/app/discussion/browser/validator.py
+++ b/plone/app/discussion/browser/validator.py
@@ -49,7 +49,7 @@ def validate(self, value):
         registry = queryUtility(IRegistry)
         settings = registry.forInterface(IDiscussionSettings, check=False)
 
-        if settings.captcha in ("captcha", "recaptcha", "norobots"):
+        if settings.captcha != "disabled":
             captcha = getMultiAdapter(
                 (aq_inner(self.context), self.request), name=settings.captcha
             )