diff --git a/audio/wavcapture.c b/audio/wavcapture.c
index 4f785f5f49..f73691cc9b 100644
--- a/audio/wavcapture.c
+++ b/audio/wavcapture.c
@@ -1,3 +1,4 @@
+/* public domain */
 #include "hw/hw.h"
 #include "monitor.h"
 #include "audio.h"