diff --git a/servers/slapd/overlays/refint.c b/servers/slapd/overlays/refint.c
index a9c0e50c5b..b7fe97e487 100644
--- a/servers/slapd/overlays/refint.c
+++ b/servers/slapd/overlays/refint.c
@@ -824,6 +824,7 @@ refint_qtask( void *ctx, void *arg )
 			op->o_tmpfree( dp->dn.bv_val, op->o_tmpmemctx );
 			op->o_tmpfree( dp, op->o_tmpmemctx );
 		}
+		op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
 
 		if ( !BER_BVISNULL( &rq->newndn )) {
 			ch_free( rq->newndn.bv_val );