diff --git a/openbsc/src/libbsc/abis_rsl.c b/openbsc/src/libbsc/abis_rsl.c
index 58e2a7c..9a4dc5b 100644
--- a/openbsc/src/libbsc/abis_rsl.c
+++ b/openbsc/src/libbsc/abis_rsl.c
@@ -677,10 +677,11 @@
 	rc =  abis_rsl_sendmsg(msg);
 
 	/* BTS will respond by RF CHAN REL ACK */
-
+#ifdef HSL_SR_1_0
 	/* The HSL Femto seems to 'forget' sending a REL ACK for TS1...TS7 */
 	if (lchan->ts->trx->bts->type == GSM_BTS_TYPE_HSL_FEMTO && lchan->ts->nr != 0)
 		rc = rsl_rx_rf_chan_rel_ack(lchan);
+#endif
 
 	return rc;
 }