diff --git a/src/shared/bass.c b/src/shared/bass.c
index 8f02086..76287cf 100644
--- a/src/shared/bass.c
+++ b/src/shared/bass.c
@@ -1818,3 +1818,17 @@ int bt_bass_clear_bis_sync(struct bt_bcast_src *bcast_src, uint8_t bis)
 
 	return 0;
 }
+
+bool bt_bass_check_bis(struct bt_bcast_src *bcast_src, uint8_t bis)
+{
+	for (uint8_t i = 0; i < bcast_src->num_subgroups; i++) {
+		struct bt_bass_subgroup_data *sgrp =
+				&bcast_src->subgroup_data[i];
+		uint32_t bitmask = 1 << (bis - 1);
+
+		if (sgrp->pending_bis_sync & bitmask)
+			return true;
+	}
+
+	return false;
+}
diff --git a/src/shared/bass.h b/src/shared/bass.h
index f3f7082..b21256e 100644
--- a/src/shared/bass.h
+++ b/src/shared/bass.h
@@ -132,3 +132,4 @@ bool bt_bass_cp_handler_unregister(struct bt_bass *bass,
 int bt_bass_set_pa_sync(struct bt_bcast_src *bcast_src, uint8_t sync_state);
 int bt_bass_set_bis_sync(struct bt_bcast_src *bcast_src, uint8_t bis);
 int bt_bass_clear_bis_sync(struct bt_bcast_src *bcast_src, uint8_t bis);
+bool bt_bass_check_bis(struct bt_bcast_src *bcast_src, uint8_t bis);