diff --git a/platform-support-status-tier3.md b/platform-support-status-tier3.md
index 019579b..98b54d6 100644
--- a/platform-support-status-tier3.md
+++ b/platform-support-status-tier3.md
@@ -33,6 +33,7 @@ See [platform-support-status.md](platform-support-status.md) for Tier 1 & Tier 2
 - [ ] arm64_32-apple-watchos
 - [ ] arm64e-apple-darwin
 - [ ] arm64e-apple-ios
+- [ ] arm64ec-pc-windows-msvc
 - [x] armeb-unknown-linux-gnueabi
 - [ ] armv4t-none-eabi
 - [ ] armv4t-unknown-linux-gnueabi
diff --git a/tools/target-list-generated b/tools/target-list-generated
index c4d9faa..f589824 100644
--- a/tools/target-list-generated
+++ b/tools/target-list-generated
@@ -166,6 +166,7 @@ illumos_targets=(
 windows_msvc_targets=(
     aarch64-pc-windows-msvc
     aarch64-uwp-windows-msvc # tier3
+    arm64ec-pc-windows-msvc # tier3
     i586-pc-windows-msvc
     i686-pc-windows-msvc
     i686-uwp-windows-msvc # tier3