Index: tonezone.c
===================================================================
--- tonezone.c	(revision 1685)
+++ tonezone.c	(working copy)
@@ -37,6 +37,11 @@
 #define CLIP 32635
 #define BIAS 0x84
 
+/* FreeBSD does not have ENODATA, we must define it. */
+#ifndef ENODATA
+#define ENODATA  61
+#endif
+
 struct tone_zone *tone_zone_find(char *country)
 {
 	struct tone_zone *z;
Index: configure.ac
===================================================================
--- configure.ac	(revision 1685)
+++ configure.ac	(working copy)
@@ -46,6 +46,8 @@
 
 AC_LANG(C)
 
+AC_CHECK_HEADERS([sys/ioctl.h])
+
 AST_EXT_LIB([curses], [initscr], [curses.h], [CURSES], [curses], [])
 AST_EXT_LIB([ncurses], [initscr], [curses.h], [NCURSES], [ncurses], [])
 AST_EXT_LIB([newt], [newtBell], [newt.h], [NEWT], [newt])
Index: ztmonitor.c
===================================================================
--- ztmonitor.c	(revision 1685)
+++ ztmonitor.c	(working copy)
@@ -45,8 +45,16 @@
 #include <zaptel/zaptel.h>
 #include <zaptel/tonezone.h>
 #endif
+
+#if defined(__linux__)
 #include <linux/soundcard.h>
+#elif defined(__FreeBSD__)
+#include <sys/soundcard.h>
+#else
+#include <soundcard.h>
+#endif
 
+
 #define BUFFERS 4
 
 #define FRAG_SIZE 8
Index: wctdm.h
===================================================================
--- wctdm.h	(revision 1685)
+++ wctdm.h	(working copy)
@@ -26,7 +26,7 @@
 #ifndef _WCTDM_H
 #define _WCTDM_H
 
-#include <linux/ioctl.h>
+#include <sys/ioctl.h>
 
 #define NUM_REGS	  109
 #define NUM_INDIRECT_REGS 105