diff --git a/src/openvpn/openvpn.vcxproj.filters b/src/openvpn/openvpn.vcxproj.filters
index a4dbb6cd..3b75eecd 100644
--- a/src/openvpn/openvpn.vcxproj.filters
+++ b/src/openvpn/openvpn.vcxproj.filters
@@ -518,6 +518,9 @@
     <ClInclude Include="ssl_util.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="win32-util.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="openvpn_win32_resources.rc">
diff --git a/src/openvpn/win32.h b/src/openvpn/win32.h
index 23573835..f075e0ae 100644
--- a/src/openvpn/win32.h
+++ b/src/openvpn/win32.h
@@ -30,6 +30,7 @@
 #include "mtu.h"
 #include "openvpn-msg.h"
 #include "argv.h"
+#include "win32-util.h"
 
 /* location of executables */
 #define SYS_PATH_ENV_VAR_NAME "SystemRoot"  /* environmental variable name that normally contains the system path */