diff --git a/Modules/linuxaudiodev.c b/Modules/linuxaudiodev.c
index 5bcbaf2..72ba567 100644
--- a/Modules/linuxaudiodev.c
+++ b/Modules/linuxaudiodev.c
@@ -27,10 +27,20 @@
 #endif
 
 #include <sys/ioctl.h>
+#if defined(linux)
 #include <linux/soundcard.h>
 
 typedef unsigned long uint32_t;
 
+#elif defined(__FreeBSD__)
+#include <machine/soundcard.h>
+
+#ifndef SNDCTL_DSP_CHANNELS
+#define SNDCTL_DSP_CHANNELS SOUND_PCM_WRITE_CHANNELS
+#endif
+
+#endif
+
 typedef struct {
     PyObject_HEAD;
     int		x_fd;		/* The open file */