diff --git a/ports/lcm/CONTROL b/ports/lcm/CONTROL
index 0cca68404..2621e23c5 100644
--- a/ports/lcm/CONTROL
+++ b/ports/lcm/CONTROL
@@ -1,5 +1,5 @@
 Source: lcm
-Version: 1.3.95-1
+Version: 1.4.0
 Build-Depends: glib
 Description: Lightweight Communications and Marshalling (LCM)
   LCM is a set of libraries and tools for message passing and data marshalling, targeted at real-time systems where high-bandwidth and low latency are critical. It provides a publish/subscribe message passing model and automatic marshalling/unmarshalling code generation with bindings for applications in a variety of programming languages.
diff --git a/ports/lcm/fix-build-error.patch b/ports/lcm/fix-build-error.patch
new file mode 100644
index 000000000..ffca33d79
--- /dev/null
+++ b/ports/lcm/fix-build-error.patch
@@ -0,0 +1,32 @@
+diff --git a/lcm/windows/WinPorting.cpp b/lcm/windows/WinPorting.cpp
+index e22acd6..b9c7e69 100644
+--- a/lcm/windows/WinPorting.cpp
++++ b/lcm/windows/WinPorting.cpp
+@@ -1,8 +1,8 @@
+ 
+ #define _WIN32_WINNT 0x0501
+-#include <Mswsock.h>
+ #include <stdio.h>
+ #include <winsock2.h>
++#include <Mswsock.h>
+ 
+ #include "WinPorting.h"
+ 
+diff --git a/lcmgen/emit_go.c b/lcmgen/emit_go.c
+index c520044..b5be56a 100644
+--- a/lcmgen/emit_go.c
++++ b/lcmgen/emit_go.c
+@@ -6,8 +6,13 @@
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <string.h>
++#ifdef WIN32
++#include <io.h>
++#else
+ #include <unistd.h>
++#endif
+ #ifdef WIN32
++#define F_OK 0
+ #define __STDC_FORMAT_MACROS  // Enable integer types
+ #endif
+ 
diff --git a/ports/lcm/portfile.cmake b/ports/lcm/portfile.cmake
index b50139f62..ef1633d84 100644
--- a/ports/lcm/portfile.cmake
+++ b/ports/lcm/portfile.cmake
@@ -3,14 +3,11 @@ include(vcpkg_common_functions)
 vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO lcm-proj/lcm
-    REF 82bd3a223e3227c70832307e53a65c13c1e5f81b
-    SHA512 5d3abf457e18a3bb50489ed17393c5416a459134f73c264e67d174a29411d6deb70c754b5669422a438ea3e5793b9b1b91d67e9d842151c5a910245fede5879f
+    REF v1.4.0
+    SHA512 ca036aa2c31911e0bfaeab9665188c97726201267314693a1c333c4efe13ea598b39a55a19bc1d48e65462ac9d1716adfda5af86c645d59c3247192631247cc6
     HEAD_REF master
-)
-
-vcpkg_apply_patches(
-    SOURCE_PATH ${SOURCE_PATH}
-    PATCHES ${CMAKE_CURRENT_LIST_DIR}/only-install-one-flavor.patch
+    PATCHES only-install-one-flavor.patch
+            fix-build-error.patch
 )
 
 vcpkg_configure_cmake(