diff --git a/ci/install-rust.yml b/ci/install-rust.yml
index ca9e2c4..163eda8 100644
--- a/ci/install-rust.yml
+++ b/ci/install-rust.yml
@@ -15,7 +15,7 @@ steps:
   # Windows.
   - script: |
       curl -sSf -o rustup-init.exe https://win.rustup.rs
-      rustup-init.exe -y --default-toolchain %RUSTUP_TOOLCHAIN%
+      rustup-init.exe -y --default-toolchain %RUSTUP_TOOLCHAIN% --default-host x86_64-pc-windows-msvc
       set PATH=%PATH%;%USERPROFILE%\.cargo\bin
       echo "##vso[task.setvariable variable=PATH;]%PATH%;%USERPROFILE%\.cargo\bin"
     env: