1 files changed, 5 insertions, 1 deletions

diff --git a/sway/ipc-server.c b/sway/ipc-server.c
index de72beca..ba0cb310 100644
--- a/sway/ipc-server.c
+++ b/sway/ipc-server.c
@@ -414,7 +414,11 @@ void ipc_client_handle_command(struct ipc_client *client) {
                                 struct libinput_device *device = input_devices->items[i];
                                 char* identifier = libinput_dev_unique_id(device);
                                 json_object *device_object = json_object_new_object();
-                                json_object_object_add(device_object, "identifier", json_object_new_string(identifier));
+                                if (!identifier) {
+                                        json_object_object_add(device_object, "identifier", NULL);
+                                } else {
+                                        json_object_object_add(device_object, "identifier", json_object_new_string(identifier));
+                                }
                                 json_object_array_add(inputs, device_object);
                                 free(identifier);
                         }