diff --git a/android/hal-utils.c b/android/hal-utils.c
index 4f44d98..e3c0c60 100644
--- a/android/hal-utils.c
+++ b/android/hal-utils.c
@@ -33,6 +33,9 @@ const char *bt_uuid_t2str(const uint8_t *uuid, char *buf)
 	unsigned int i;
 	int is_bt;
 
+	if (!uuid)
+		return strcpy(buf, "NULL");
+
 	is_bt = !memcmp(&uuid[4], &BT_BASE_UUID[4], HAL_UUID_LEN - 4);
 
 	for (i = 0; i < HAL_UUID_LEN; i++) {
@@ -167,6 +170,9 @@ const char *bt_bdaddr_t2str(const bt_bdaddr_t *bd_addr, char *buf)
 {
 	const uint8_t *p = bd_addr->address;
 
+	if (!bd_addr)
+		return strcpy(buf, "NULL");
+
 	snprintf(buf, MAX_ADDR_STR_LEN, "%02x:%02x:%02x:%02x:%02x:%02x",
 					p[0], p[1], p[2], p[3], p[4], p[5]);