diff --git a/openbsc/src/libbsc/bsc_api.c b/openbsc/src/libbsc/bsc_api.c
index 86d2493..e567038 100644
--- a/openbsc/src/libbsc/bsc_api.c
+++ b/openbsc/src/libbsc/bsc_api.c
@@ -31,6 +31,7 @@
 #include <openbsc/handover.h>
 #include <openbsc/debug.h>
 #include <openbsc/gsm_04_08.h>
+#include <openbsc/trau_mux.h>
 
 #include <osmocom/gsm/protocol/gsm_08_08.h>
 
@@ -419,6 +420,10 @@
 		return;
 	}
 
+	/* switch TRAU muxer for E1 based BTS from one channel to another */
+	if (is_e1_bts(conn->bts))
+		switch_trau_mux(conn->lchan, conn->secondary_lchan);
+
 	/* swap channels */
 	osmo_timer_del(&conn->T10);