diff --git a/src/Module/Register.php b/src/Module/Register.php
index aaca8c02e2..ad49555e69 100644
--- a/src/Module/Register.php
+++ b/src/Module/Register.php
@@ -262,7 +262,7 @@ class Register extends BaseModule
 				$a->internalRedirect('register/');
 			}
 			// Is there text in the tar pit?
-			if (!empty($_POST('registertarpit'))) {
+			if (!empty($_POST['registertarpit'])) {
 				\notice(L10n::t('You have entered too much information.'));
 				$a->internalRedirect('register/');
 			}