diff --git a/m4/docs.m4 b/m4/docs.m4
index b424ab66..55d78eb8 100644
--- a/m4/docs.m4
+++ b/m4/docs.m4
@@ -12,7 +12,7 @@ AC_DEFUN([AC_FLDIGI_DOCS], [
       asciidoc_min=8.2.0
       if test "x$ASCIIDOC" != "x"; then
           AC_MSG_CHECKING([for asciidoc >= $asciidoc_min])
-          asciidoc_ver=$($ASCIIDOC --version | sed -n '1 { s/.* //; p }')
+          asciidoc_ver=$($ASCIIDOC --version | sed -n '1 s/.* //; p')
           AX_COMPARE_VERSION([$asciidoc_ver], [ge], [$asciidoc_min],
                              [AC_MSG_RESULT([yes ($asciidoc_ver)])],
                              [AC_MSG_RESULT([no ($asciidoc_ver)]); ASCIIDOC=""])
diff --git a/m4/oss.m4 b/m4/oss.m4
index 0c0f8a60..98f80d9c 100644
--- a/m4/oss.m4
+++ b/m4/oss.m4
@@ -19,7 +19,8 @@ AC_DEFUN([AC_FLDIGI_OSS], [
       AC_DEFINE(USE_OSS, 0, [Defined if we are using OSS])
   else
       AC_CHECK_HEADER( [sys/soundcard.h], [ac_cv_oss=yes],
-                       [AC_CHECK_HEADER([machine/soundcard.h], [ac_cv_oss=yes], [])] )
+                       [AC_CHECK_HEADER([machine/soundcard.h], [ac_cv_oss=yes],
+		       [AC_CHECK_HEADER([soundcard.h], [ac_cv_oss=yes], [])])])
       if test "x$ac_cv_want_oss" = "xcheck"; then
           if test "x$ac_cv_oss" = "xyes"; then
               AC_DEFINE(USE_OSS, 1, [Defined if we are using OSS])
diff --git a/src/dialogs/fl_digi.cxx b/src/dialogs/fl_digi.cxx
index c73a6a7a..015aac25 100644
--- a/src/dialogs/fl_digi.cxx
+++ b/src/dialogs/fl_digi.cxx
@@ -2091,7 +2091,10 @@ void ztimer(void* first_call)
 		Fl::repeat_timeout(1.0, ztimer);
 
 	struct tm tm;
-	gmtime_r(&tv.tv_sec, &tm);
+	time_t t_temp;
+
+	t_temp=(time_t)tv.tv_sec;
+	gmtime_r(&t_temp, &tm);
 	if (!strftime(ztbuf, sizeof(ztbuf), "%Y%m%d %H%M%S", &tm))
 		memset(ztbuf, 0, sizeof(ztbuf));
 	else
diff --git a/src/include/configuration.h b/src/include/configuration.h
index 09824a99..aaf98166 100644
--- a/src/include/configuration.h
+++ b/src/include/configuration.h
@@ -40,6 +40,14 @@
 #  define DEFAULT_PTTDEV "/dev/ttyd0"
 #  define DEFAULT_CWFSKPORT "/dev/ttyd1"
 #  define DEFAULT_HAMRIGDEVICE "/dev/ttyd0"
+#elif defined(__NetBSD__)
+#  define DEFAULT_PTTDEV "/dev/tty00"
+#  define DEFAULT_CWFSKPORT "/dev/tty01"
+#  define DEFAULT_HAMRIGDEVICE "/dev/tty00"
+#elif defined(__OpenBSD__)
+#  define DEFAULT_PTTDEV "/dev/tty00"
+#  define DEFAULT_CWFSKPORT "/dev/tty01"
+#  define DEFAULT_HAMRIGDEVICE "/dev/tty00"
 #elif defined(__WOE32__)
 #  define DEFAULT_PTTDEV "COM1"
 #  define DEFAULT_CWFSKPORT "COM2"
diff --git a/src/include/mixer.h b/src/include/mixer.h
index e65767c2..aa48f8f0 100644
--- a/src/include/mixer.h
+++ b/src/include/mixer.h
@@ -32,7 +32,11 @@
 #include <string>
 
 #if USE_OSS
+#  if defined(__OpenBSD__)
+#    include <soundcard.h>
+#  else
 #    include <sys/soundcard.h>
+#  endif
 #endif
 
 class MixerException {
diff --git a/src/include/socket.h b/src/include/socket.h
index 58f61919..ccb0e94b 100644
--- a/src/include/socket.h
+++ b/src/include/socket.h
@@ -29,6 +29,9 @@
 #ifndef __MINGW32__
 #  include <sys/socket.h>
 #  include <netdb.h>
+#  if defined(__OpenBSD__) && defined(nitems)
+#    undef nitems
+#  endif
 #  include <netinet/in.h>
 #else
 #  include <winsock2.h>
diff --git a/src/misc/configuration.cxx b/src/misc/configuration.cxx
index fc7c3c62..ba3340c5 100644
--- a/src/misc/configuration.cxx
+++ b/src/misc/configuration.cxx
@@ -970,6 +970,8 @@ out:
 		"/dev/usb/ttyUSB%u"
 #elif defined(__FreeBSD__)
 		"/dev/ttyd%u"
+#elif defined(__OpenBSD__) || defined(__NetBSD__)
+		"/dev/tty%2.2u"
 #elif defined(__CYGWIN__)
 		"/dev/ttyS%u"
 #elif defined(__MINGW32__)
@@ -984,6 +986,8 @@ out:
 #  define TTY_MAX 255
 #elif defined(__APPLE__)
 	glob_t gbuf;
+#elif defined(__OpenBSD__) || defined(__NetBSD__)
+#  define TTY_MAX 4
 #else
 #  define TTY_MAX 8
 #endif
diff --git a/src/misc/macroedit.cxx b/src/misc/macroedit.cxx
index 04f9d94a..66e7f3cb 100644
--- a/src/misc/macroedit.cxx
+++ b/src/misc/macroedit.cxx
@@ -224,7 +224,12 @@ void loadBrowser(Fl_Widget *widget) {
 	}
 	w->add(LINE_SEP);
 	struct stat st;
+
+#  if defined(__OpenBSD__)
+	for (int i = 0; i < gbuf.gl_pathc; i++) {
+#  else
 	for (size_t i = 0; i < gbuf.gl_pathc; i++) {
+#  endif
 		if (!(stat(gbuf.gl_pathv[i], &st) == 0
 		      && S_ISREG(st.st_mode) && (st.st_mode & S_IXUSR)))
 			continue;
diff --git a/src/misc/socket.cxx b/src/misc/socket.cxx
index bfd8a2d2..dcb50eed 100644
--- a/src/misc/socket.cxx
+++ b/src/misc/socket.cxx
@@ -27,6 +27,9 @@
 #ifndef __MINGW32__
 #  include <sys/socket.h>
 #  include <netdb.h>
+#  if defined(__OpenBSD__) && defined(nitems)
+#    undef nitems
+#  endif
 #  include <arpa/inet.h>
 #  include <netinet/in.h>
 #  include <sys/time.h>
diff --git a/src/rigcontrol/rigMEM.cxx b/src/rigcontrol/rigMEM.cxx
index 6c21d540..3555f369 100644
--- a/src/rigcontrol/rigMEM.cxx
+++ b/src/rigcontrol/rigMEM.cxx
@@ -22,6 +22,10 @@
 
 #include <config.h>
 
+#if defined(__OpenBSD__)
+#  include <sys/types.h>
+#endif
+
 #if !defined(__WOE32__) && !defined(__APPLE__)
 #  include <sys/ipc.h>
 #  include <sys/msg.h>
diff --git a/src/soundcard/mixer.cxx b/src/soundcard/mixer.cxx
index fbdcff15..66e52b1c 100644
--- a/src/soundcard/mixer.cxx
+++ b/src/soundcard/mixer.cxx
@@ -36,8 +36,12 @@
 #include <sys/stat.h>
 #include <errno.h>
 #if USE_OSS
-#    include <sys/ioctl.h>
+#  include <sys/ioctl.h>
+#  if defined(__OpenBSD__)
+#    include <soundcard.h>
+#  else
 #    include <sys/soundcard.h>
+#  endif
 #endif
 #include <math.h>
 
diff --git a/src/soundcard/sound.cxx b/src/soundcard/sound.cxx
index e5d6abc8..f83f314e 100644
--- a/src/soundcard/sound.cxx
+++ b/src/soundcard/sound.cxx
@@ -45,8 +45,12 @@
 #include <limits.h>
 
 #if USE_OSS
-#    include <sys/ioctl.h>
+#  include <sys/ioctl.h>
+#  if defined(__OpenBSD__)
+#    include <soundcard.h>
+#  else
 #    include <sys/soundcard.h>
+#  endif
 #endif
 #include <math.h>
 
diff --git a/src/wefax/wefax.cxx b/src/wefax/wefax.cxx
index 08284661..46efac24 100644
--- a/src/wefax/wefax.cxx
+++ b/src/wefax/wefax.cxx
@@ -881,7 +881,7 @@ public:
 	/// Called when loading a file from the GUI, or indirectly from XML-RPC.
 	bool transmit_lock_acquire(const std::string & filnam, double delay = wefax::max_delay )
 	{
-		LOG_INFO("Sending %s delay=%f tid=%d", filnam.c_str(), delay, GET_THREAD_ID() );
+		LOG_INFO("Sending %s delay=%f tid=%d", filnam.c_str(), delay, (int)GET_THREAD_ID() );
 		guard_lock g( m_sync_tx_fil.mtxp() );
 		LOG_INFO("Locked");
 		if ( ! m_tx_fil.empty() )
@@ -896,7 +896,7 @@ public:
 	/// Allows to send another file. Called by XML-RPC and the GUI.
 	void transmit_lock_release( const std::string & err_msg )
 	{
-		LOG_INFO("err_msg=%s tid=%d", err_msg.c_str(), GET_THREAD_ID() );
+		LOG_INFO("err_msg=%s tid=%d", err_msg.c_str(), (int)GET_THREAD_ID() );
 		guard_lock g( m_sync_tx_msg.mtxp() );
 		LOG_INFO("%s %s", m_tx_fil.c_str(), err_msg.c_str() );
 		if( m_tx_fil.empty() )
@@ -1031,7 +1031,7 @@ public:
 				}
 			}
 
-			LOG_INFO("Shift: i=%d hist=%d", best_shift_idx, biggest_shift );
+			LOG_INFO("Shift: i=%d hist=%d", (int)best_shift_idx, (int)biggest_shift );
 		}
 		return best_shift_idx ;
 	}
@@ -2491,19 +2491,9 @@ wefax::wefax(trx_mode wefax_mode) : modem()
 // receive processing
 //=====================================================================
 
-#ifdef __linux__
-
-#include <sys/timeb.h>
 /// This must return the current time in seconds with high precision.
-static double current_time(void)
-{
-	struct timeb tmp_timb ;
-	ftime( &tmp_timb );
 
-	return (double)tmp_timb.time + tmp_timb.millitm / 1000.0 ;
-}
-
-#else
+#if defined(__WIN32__) || defined(__APPLE__)
 #include <ctime>
 /// This is much less accurate.
 static double current_time(void)
@@ -2512,8 +2502,50 @@ static double current_time(void)
 
 	return clks * 1.0 / CLOCKS_PER_SEC;
 }
-#endif
+#else
+#if defined(HAVE_CLOCK_GETTIME)
 
+#include <sys/time.h>
+
+static double current_time(void)
+{
+//  DJV/AB3NR
+// Replace call to deprecated ftime() function with call to
+// clock_gettime(2).  clock_gettime(2) is POSIX.1 compliant.
+// Replace ifdef __linux__ with autoconf generated guard.
+// (Note __linux__ fails for *BSD, which all have better functions
+// than the fallback Windows routine.  Note, clock(2) on Unix systems
+// returns CPU time used so far.  It's not a "clock" in any generally
+// accepted sense of the word.
+//
+// Check system call return codes and abort on failure.
+//  DJV/AB3NR
+
+	struct timespec ts;
+	double curtime;
+
+// Do not know if CLOCK_MONOTONIC or CLOCK_REALTIME is appropriate. DJV
+
+	if(clock_gettime(CLOCK_REALTIME, &ts)!=0) {
+                LOG_PERROR("clock_gettime");
+                abort();
+        }
+	curtime= ts.tv_nsec*1e-09 + (double)ts.tv_sec;
+	return curtime;
+}
+#else
+#include <ctime>
+// This is much less accurate.
+// Add compile time warning  DJV/AB3NR
+#warning imprecise clock() call in function current_time in wefax.cxx
+static double current_time(void)
+{
+	clock_t clks = clock();
+
+	return clks * 1.0 / CLOCKS_PER_SEC;
+}
+#endif // HAVE_CLOCK_GETTIME
+#endif //__WIN32__
 
 /// Callback continuously called by fldigi modem class.
 int wefax::rx_process(const double *buf, int len)