--- a/SoundStream.st	Mon Jan 06 14:29:53 2020 +0100
+++ b/SoundStream.st	Mon Jan 06 14:49:20 2020 +0100
@@ -125,6 +125,9 @@
 #ifdef SUPPORT_DEV_AUDIO
 # ifdef LINUX
 #  include <stdio.h>
+#  include <errno.h>
+#  include <signal.h>
+#  include <sys/ioctl.h>
 #  include <sys/soundcard.h>
 #  define DEV_AUDIO_DEFAULT_FREQ (8000)
 #  define DEV_AUDIO_DEFAULT_BUFFERSIZE (16384)