diff --git a/db/StoredProcedures.sql b/db/StoredProcedures.sql
index 741e5728ce179edcd0a7b4a64d75de8e3c500989..51a8910ccd61409bfc371192b6bccabd999b1ada 100644
--- a/db/StoredProcedures.sql
+++ b/db/StoredProcedures.sql
@@ -1560,7 +1560,7 @@ BEGIN
 		RETURN -1;
 	END IF;
 
-	IF AuthorID = BindingTeacher
+	IF AuthorID = BindingTeacher THEN
 		RETURN -1;
 	END IF;