diff --git a/doc/src/sgml/libpq.sgml b/doc/src/sgml/libpq.sgml
index 0f3475730c..9ea7c56265 100644
--- a/doc/src/sgml/libpq.sgml
+++ b/doc/src/sgml/libpq.sgml
@@ -4052,7 +4052,7 @@ char *PQescapeLiteral(PGconn *conn, const char *str, size_t length);
      </tip>
 
      <para>
-      Note that it is not necessary nor correct to do escaping when a data
+      Note that it is neither necessary nor correct to do escaping when a data
       value is passed as a separate parameter in <function>PQexecParams</function> or
       its sibling routines.
      </para>