diff --git a/windows/base/Dockerfile b/windows/base/Dockerfile
index 00cb758482864ff934cf9fee0f164c521b576935..2acbe16a7e77e4f702c26d567c4eae93a91aeb56 100644
--- a/windows/base/Dockerfile
+++ b/windows/base/Dockerfile
@@ -54,7 +54,8 @@ RUN $vcpkg_dir = 'C:/ProgramData/vcpkg'; \
     [Environment]::SetEnvironmentVariable('VCPKG_DIR', "\"$vcpkg_dir\"", [EnvironmentVariableTarget]::Machine); \
     [Environment]::SetEnvironmentVariable('VCPKG_DEFAULT_TRIPLET', "\"$vcpkg_default_triplet\"", [EnvironmentVariableTarget]::Machine); \
     [Environment]::SetEnvironmentVariable('CMAKE_TOOLCHAIN_FILE', "\"$vcpkg_dir/scripts/buildsystems/vcpkg.cmake\"", [EnvironmentVariableTarget]::Machine); \
-    [Environment]::SetEnvironmentVariable('VCPKG_INSTALL_DIR', "\"$vcpkg_dir/installed/$vcpkg_default_triplet\"", [EnvironmentVariableTarget]::Machine);
+    [Environment]::SetEnvironmentVariable('VCPKG_INSTALL_DIR', "\"$vcpkg_dir/installed/$vcpkg_default_triplet\"", [EnvironmentVariableTarget]::Machine); \
+    [Environment]::SetEnvironmentVariable('VCPKG_TARGET_TRIPLET', "\"$vcpkg_default_triplet\"", [EnvironmentVariableTarget]::Machine)
 ADD powershell/30-Vcpkg-CMake.ps1 /Windows/System32/WindowsPowerShell/v1.0/profile.d/30-Vcpkg-CMake.ps1
 
 RUN cd $env:VCPKG_DIR; \