diff --git a/columninfo.c b/columninfo.c
index 045513d..cb39e2c 100644
--- a/columninfo.c
+++ b/columninfo.c
@@ -73,7 +73,7 @@ CI_read_fields_from_pgres(ColumnInfoClass *self, PGresult *pgres)
        {
                /* according to that allocate memory */
                CI_set_num_fields(self, new_num_fields);
-               if (NULL == self->coli_array)
+               if (new_num_fields > 0 && NULL == self->coli_array)
                        return FALSE;
        }