diff --git a/ports/libmodbus/CMakeLists.txt b/ports/libmodbus/CMakeLists.txt
index cab9c897d6..0abb4b6a7c 100644
--- a/ports/libmodbus/CMakeLists.txt
+++ b/ports/libmodbus/CMakeLists.txt
@@ -7,41 +7,52 @@ set(LIBMODBUS_VERSION_MINOR ${PROJECT_VERSION_MINOR})
 set(LIBMODBUS_VERSION_MICRO ${PROJECT_VERSION_PATCH})
 configure_file(src/modbus-version.h.in ${CMAKE_CURRENT_BINARY_DIR}/modbus-version.h)
 
-include(CheckIncludeFile)
-check_include_file(arpa/inet.h HAVE_ARPA_INET_H)
-check_include_file(byteswap.h HAVE_BYTESWAP_H)
-check_include_file(errno.h HAVE_ERRNO_H)
-check_include_file(fcntl.h HAVE_FCNTL_H)
-check_include_file(limits.h HAVE_LIMITS_H)
-check_include_file(linux/serial.h HAVE_LINUX_SERIAL_H)
-check_include_file(netdb.h HAVE_NETDB_H)
-check_include_file(netinet/in.h HAVE_NETINET_IN_H)
-check_include_file(netinet/tcp.h HAVE_NETINET_TCP_H)
-check_include_file(sys/ioctl.h HAVE_SYS_IOCTL_H)
-check_include_file(sys/params.h HAVE_SYS_PARAMS_H)
-check_include_file(sys/socket.h HAVE_SYS_SOCKET_H)
-check_include_file(sys/time.h HAVE_SYS_TIME_H)
-check_include_file(sys/types.h HAVE_SYS_TYPES_H)
-check_include_file(termios.h HAVE_TERMIOS_H)
-check_include_file(time.h HAVE_TIME_H)
-check_include_file(unistd.h HAVE_UNISTD_H)
+if(WIN32)
+  set(HAVE_ERRNO_H 1)
+  set(HAVE_FCNTL_H 1)
+  set(HAVE_LIMITS_H 1)
+  set(HAVE_SYS_TYPES_H 1)
+  set(HAVE_TIME_H 1)
+  set(HAVE_MALLOC 1)
+  set(HAVE_MEMSET 1)
+  set(HAVE_STRERROR 1)
+else()
+  include(CheckIncludeFile)
+  check_include_file(arpa/inet.h HAVE_ARPA_INET_H)
+  check_include_file(byteswap.h HAVE_BYTESWAP_H)
+  check_include_file(errno.h HAVE_ERRNO_H)
+  check_include_file(fcntl.h HAVE_FCNTL_H)
+  check_include_file(limits.h HAVE_LIMITS_H)
+  check_include_file(linux/serial.h HAVE_LINUX_SERIAL_H)
+  check_include_file(netdb.h HAVE_NETDB_H)
+  check_include_file(netinet/in.h HAVE_NETINET_IN_H)
+  check_include_file(netinet/tcp.h HAVE_NETINET_TCP_H)
+  check_include_file(sys/ioctl.h HAVE_SYS_IOCTL_H)
+  check_include_file(sys/params.h HAVE_SYS_PARAMS_H)
+  check_include_file(sys/socket.h HAVE_SYS_SOCKET_H)
+  check_include_file(sys/time.h HAVE_SYS_TIME_H)
+  check_include_file(sys/types.h HAVE_SYS_TYPES_H)
+  check_include_file(termios.h HAVE_TERMIOS_H)
+  check_include_file(time.h HAVE_TIME_H)
+  check_include_file(unistd.h HAVE_UNISTD_H)
 
-include(CheckFunctionExists)
-check_function_exists(accept4 HAVE_ACCEPT4)
-check_function_exists(fork HAVE_FORK)
-check_function_exists(getaddrinfo HAVE_GETADDRINFO)
-check_function_exists(gettimeofday HAVE_GETTIMEOFDAY)
-check_function_exists(inet_ntoa HAVE_INET_NTOA)
-check_function_exists(malloc HAVE_MALLOC)
-check_function_exists(memset HAVE_MEMSET)
-check_function_exists(select HAVE_SELECT)
-check_function_exists(socket HAVE_SOCKET)
-check_function_exists(strerror HAVE_STRERROR)
-check_function_exists(strlcpy HAVE_STRLCPY)
+  include(CheckFunctionExists)
+  check_function_exists(accept4 HAVE_ACCEPT4)
+  check_function_exists(fork HAVE_FORK)
+  check_function_exists(getaddrinfo HAVE_GETADDRINFO)
+  check_function_exists(gettimeofday HAVE_GETTIMEOFDAY)
+  check_function_exists(inet_ntoa HAVE_INET_NTOA)
+  check_function_exists(malloc HAVE_MALLOC)
+  check_function_exists(memset HAVE_MEMSET)
+  check_function_exists(select HAVE_SELECT)
+  check_function_exists(socket HAVE_SOCKET)
+  check_function_exists(strerror HAVE_STRERROR)
+  check_function_exists(strlcpy HAVE_STRLCPY)
 
-include(CheckSymbolExists)
-check_symbol_exists(TIOCSRS485 sys/ioctl.h HAVE_TIOCRS485)
-check_symbol_exists(TIOCM_RTS sys/ioctl.h HAVE_TIOCM_RTS)
+  include(CheckSymbolExists)
+  check_symbol_exists(TIOCSRS485 sys/ioctl.h HAVE_TIOCRS485)
+  check_symbol_exists(TIOCM_RTS sys/ioctl.h HAVE_TIOCM_RTS)
+endif()
 
 configure_file(config.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config.h)
 
@@ -66,8 +77,7 @@ src/modbus.c)
 
 target_include_directories(modbus PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
 target_include_directories(modbus INTERFACE
-  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
-  $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/modbus>
+  $<INSTALL_INTERFACE:include>
 )
 set_target_properties(modbus PROPERTIES PUBLIC_HEADER "${MODBUS_PUBLIC_HEADERS}")
 
@@ -99,5 +109,5 @@ install(EXPORT libmodbusConfig DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake)
 
 
 if(NOT DISABLE_INSTALL_HEADERS)
-  install(FILES ${MODBUS_PUBLIC_HEADERS} DESTINATION include/modbus)
+  install(FILES ${MODBUS_PUBLIC_HEADERS} DESTINATION include/)
 endif()
diff --git a/ports/libmodbus/CONTROL b/ports/libmodbus/CONTROL
index faee22d8c6..1fd7d47914 100644
--- a/ports/libmodbus/CONTROL
+++ b/ports/libmodbus/CONTROL
@@ -1,3 +1,3 @@
 Source: libmodbus
-Version: 3.1.4
+Version: 3.1.4-1
 Description: libmodbus is a free software library to send/receive data with a device which respects the Modbus protocol
diff --git a/ports/libmodbus/portfile.cmake b/ports/libmodbus/portfile.cmake
index 3d1e1abe45..8d6f2c0621 100644
--- a/ports/libmodbus/portfile.cmake
+++ b/ports/libmodbus/portfile.cmake
@@ -14,13 +14,12 @@ vcpkg_configure_cmake(
   SOURCE_PATH "${SOURCE_PATH}"
   PREFER_NINJA
   OPTIONS_DEBUG
-  -DDISABLE_INSTALL_HEADERS=ON
+    -DDISABLE_INSTALL_HEADERS=ON
 )
 
 vcpkg_install_cmake()
 vcpkg_copy_pdbs()
 
-
 vcpkg_fixup_cmake_targets(CONFIG_PATH "lib/cmake")
 
 # Handle copyright