diff --git a/action-types.yml b/action-types.yml
new file mode 100644
index 0000000..794fd5e
--- /dev/null
+++ b/action-types.yml
@@ -0,0 +1,18 @@
+# See https://github.com/krzema12/github-actions-typing
+inputs:
+  vswhere-path:
+    type: string
+  vs-version:
+    type: string
+  vs-prerelease:
+    type: boolean
+  msbuild-architecture:
+    type: enum
+    name: Architecture
+    allowed-values:
+    - x86
+    - x64
+    - arm64
+outputs:
+  msbuildPath:
+    type: string
diff --git a/action.yml b/action.yml
index e88ae5b..afbcc2f 100644
--- a/action.yml
+++ b/action.yml
@@ -15,7 +15,7 @@ inputs:
     description: 'Enable searching for pre-release versions of Visual Studio/MSBuild'
     required: false
   msbuild-architecture:
-    description: 'The preferred processor architecture of MSBuild. Can be either "x86" or "x64". "x64" is only available from Visual Studio version 17.0 and later.'
+    description: 'The preferred processor architecture of MSBuild. Can be either "x86", "x64", or "arm64". "x64" is only available from Visual Studio version 17.0 and later.'
     required: false
     default: 'x86'
 outputs: