diff --git a/library/MYDDAS/myddas_prolog2sql.yap b/library/MYDDAS/myddas_prolog2sql.yap
index 79d595572..873a5340f 100644
--- a/library/MYDDAS/myddas_prolog2sql.yap
+++ b/library/MYDDAS/myddas_prolog2sql.yap
@@ -1031,7 +1031,7 @@ query_atom(existential_subquery(Select,From,Where),QueryList,Diff):-
    clause_atom('SELECT',Select,',',X1,X2),
    clause_atom('FROM',From,',',X2,X3),
    clause_atom('WHERE',Where,'AND',X3,X4),
-   column_atom(')',X4,Diff).
+   column_atom('LIMIT 1)',X4,Diff).