diff --git a/src/device.c b/src/device.c
index faf07ba..b29aa19 100644
--- a/src/device.c
+++ b/src/device.c
@@ -4624,8 +4624,11 @@ static struct btd_service *probe_service(struct btd_device *device,
 		return NULL;
 
 	l = find_service_with_profile(device->services, profile);
+	/* If the service already exists, return NULL so that it won't be added
+	 * to the device->services.
+	 */
 	if (l)
-		return l->data;
+		return NULL;
 
 	service = service_create(device, profile);