diff --git a/include/hamlib/rig.h b/include/hamlib/rig.h
index 6a251e26e..6513a3a23 100644
--- a/include/hamlib/rig.h
+++ b/include/hamlib/rig.h
@@ -2439,7 +2439,6 @@ extern HAMLIB_EXPORT(const char *) rig_copyright HAMLIB_PARAMS(());
 HAMLIB_EXPORT(void) rig_no_restore_ai();
 
 #include <unistd.h>
-#include <pthread.h> // so configure can pick up nanosleep on Win32
 extern HAMLIB_EXPORT(int) hl_usleep(useconds_t msec);
 
 __END_DECLS
diff --git a/lib/termios.c b/lib/termios.c
index 86ea26eab..1d24392b8 100644
--- a/lib/termios.c
+++ b/lib/termios.c
@@ -1,4 +1,5 @@
 #ifdef HAVE_CONFIG_H
+#include "hamlib/rig.h"
 #include <config.h>
 #endif
 
diff --git a/macros/gr_pwin32.m4 b/macros/gr_pwin32.m4
index 090972f78..0687200da 100644
--- a/macros/gr_pwin32.m4
+++ b/macros/gr_pwin32.m4
@@ -23,6 +23,8 @@
 AC_DEFUN([GR_PWIN32],
 [
 AC_REQUIRE([AC_HEADER_TIME])
+AC_SEARCH_LIBS([nanosleep], [pthread], [], [AC_MSG_ERROR([unable to find nanosleep])])
+AC_CHECK_HEADERS([pthread.h])
 AC_CHECK_HEADERS([sys/types.h])
 AC_CHECK_HEADERS([windows.h])
 AC_CHECK_HEADERS([winioctl.h winbase.h], [], [], [
@@ -33,6 +35,9 @@ AC_CHECK_HEADERS([winioctl.h winbase.h], [], [], [
 
 AC_CHECK_FUNCS([getopt getopt_long usleep sleep nanosleep gettimeofday])
 AC_CHECK_TYPES([struct timezone, ssize_t],[],[],[
+     #if HAVE_PTHREAD_H
+     #include <pthread.h>
+     #endif
      #if HAVE_SYS_TYPES_H
      # include <sys/types.h>
      #endif
diff --git a/scripts/build-w32.sh b/scripts/build-w32.sh
old mode 100644
new mode 100755
index b1a32ebdc..a2072712d
--- a/scripts/build-w32.sh
+++ b/scripts/build-w32.sh
@@ -15,7 +15,7 @@
 BUILD_DIR=~/builds
 
 # Set this to LibUSB archive extracted in $BUILD_DIR
-LIBUSB_VER=libusb-1.0.20
+LIBUSB_VER=libusb-1.0.22
 
 # uncomment the correct HOST_ARCH= line for your minGW installation
 HOST_ARCH=i686-w64-mingw32
@@ -225,6 +225,6 @@ cp -a ${LIBUSB_1_0_BIN_PATH}/MinGW32/dll/libusb-1.0.dll ${ZIP_DIR}/bin/libusb-1.
 cp -a /usr/lib/gcc/i686-w64-mingw32/6.3-posix/libgcc_s_sjlj-1.dll ${ZIP_DIR}/bin/libgcc_s_sjlj-1.dll
 
 ## Need VC++ free toolkit installed (default Wine directory installation shown)
-( cd ${ZIP_DIR}/lib/msvc/ && wine ~/.wine/drive_c/Program\ Files/Microsoft\ Visual\ C++\ Toolkit\ 2003/bin/link.exe /lib /machine:i386 /def:libhamlib-2.def )
+( cd ${ZIP_DIR}/lib/msvc/ && wine ~/.wine/drive_c/Program\ Files\ (x86)\/Microsoft\ Visual\ Studio/2017/BuildTools/VC/Tools/MSVC/14.16.27023/bin/Hostx64/x86/bin/link.exe /lib /machine:i386 /def:libhamlib-2.def )
 
 /usr/bin/zip -r ${HL_FILENAME}.zip `basename ${ZIP_DIR}`
diff --git a/src/misc.h b/src/misc.h
index 5774eeb7a..99ae92874 100644
--- a/src/misc.h
+++ b/src/misc.h
@@ -98,6 +98,8 @@ extern HAMLIB_EXPORT(void) rig_force_cache_timeout(struct timeval *tv);
 
 extern HAMLIB_EXPORT(setting_t) rig_idx2setting(int i);
 
+extern HAMLIB_EXPORT(int) hl_usleep(useconds_t usec);
+
 #ifdef PRId64
 /** \brief printf(3) format to be used for long long (64bits) type */
 #  define PRIll PRId64
diff --git a/src/rig.c b/src/rig.c
index 3d7ab0b9e..6a3b96d4c 100644
--- a/src/rig.c
+++ b/src/rig.c
@@ -48,6 +48,7 @@
  * \example ../tests/testrig.c
  */
 
+#include "hamlib/rig.h"
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
diff --git a/src/sleep.c b/src/sleep.c
index ef86592f2..eed6a193f 100644
--- a/src/sleep.c
+++ b/src/sleep.c
@@ -39,6 +39,8 @@
 #include <errno.h>
 #include <time.h>
 #include <pthread.h>
+#include "config.h"
+#include "sleep.h"
 
 #ifdef  __cplusplus
 extern "C" {
diff --git a/src/sleep.h b/src/sleep.h
new file mode 100644
index 000000000..5f2c11d0d
--- /dev/null
+++ b/src/sleep.h
@@ -0,0 +1,35 @@
+/*
+ *  Hamlib Interface - sleep header
+ *  Copyright (c) 2020 by Michael Black W9MDB
+ *
+ *
+ *   This library is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU Lesser General Public
+ *   License as published by the Free Software Foundation; either
+ *   version 2.1 of the License, or (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *   Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public
+ *   License along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifndef _HL_SLEEP_H
+#define _HL_SLEEP_H 1
+
+#include <hamlib/rig.h>
+#include "iofunc.h"
+
+__BEGIN_DECLS
+
+/* Hamlib internal use, see rig.c */
+int hl_usleep(useconds_t usec);
+
+__END_DECLS
+
+#endif /* _HL_SLEEP_H */