diff --git a/openbsc/src/gsm_data.c b/openbsc/src/gsm_data.c
index bbf150a..de3a08d 100644
--- a/openbsc/src/gsm_data.c
+++ b/openbsc/src/gsm_data.c
@@ -156,6 +156,8 @@
 
 		ts->hopping.arfcns.data_len = sizeof(ts->hopping.arfcns_data);
 		ts->hopping.arfcns.data = ts->hopping.arfcns_data;
+		ts->hopping.ma.data_len = sizeof(ts->hopping.ma_data);
+		ts->hopping.ma.data = ts->hopping.ma_data;
 
 		for (l = 0; l < TS_MAX_LCHAN; l++) {
 			struct gsm_lchan *lchan;