diff --git a/src/options.c b/src/options.c
index f91e133..638053c 100644
--- a/src/options.c
+++ b/src/options.c
@@ -50,7 +50,7 @@ struct option_t option =
     .local_echo = false,
     .timestamp = TIMESTAMP_NONE,
     .list_devices = false,
-    .log_filename = "",
+    .log_filename = NULL,
     .socket = NULL,
     .map = "",
     .color = -1,