diff --git a/extension/Classes/Sql/function.sql b/extension/Classes/Sql/function.sql
index 2ba430362a4185b49b20aa381134fdf29ca8ef46..ff3548108b759daa063a6ebf6742af45a8e31d21 100644
--- a/extension/Classes/Sql/function.sql
+++ b/extension/Classes/Sql/function.sql
@@ -81,7 +81,7 @@ CREATE FUNCTION QIFEMPTY(input TEXT, token TEXT)
 BEGIN
   DECLARE output TEXT;
   SET output =
-      IF(ISNULL(input) OR input = '' OR INPUT = '0' OR input = '0000-00-00' OR input = '0000-00-00 00:00:00', token,
+      IF(ISNULL(input) OR input = '' OR input = '0000-00-00' OR input = '0000-00-00 00:00:00', token,
          input);
   RETURN output;
 END;