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:
diff --git a/dist/index.js b/dist/index.js
index 2b30209..134764c 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1652,7 +1652,7 @@ const IS_WINDOWS = process.platform === 'win32';
 const VS_VERSION = core.getInput('vs-version') || 'latest';
 const VSWHERE_PATH = core.getInput('vswhere-path');
 const ALLOW_PRERELEASE = core.getInput('vs-prerelease') || 'false';
-const MSBUILD_ARCH = core.getInput('msbuild-architecture') || 'x86';
+let MSBUILD_ARCH = core.getInput('msbuild-architecture') || 'x86';
 // if a specific version of VS is requested
 let VSWHERE_EXEC = '-products * -requires Microsoft.Component.MSBuild -property installationPath -latest ';
 if (ALLOW_PRERELEASE === 'true') {
@@ -1703,6 +1703,10 @@ function run() {
                     core.debug(`Found installation path: ${installationPath}`);
                     // x64 and arm64 only exist in one possible location, so no fallback probing
                     if (MSBUILD_ARCH === 'x64' || MSBUILD_ARCH === 'arm64') {
+                        // x64 is actually amd64 so change to that
+                        if (MSBUILD_ARCH === 'x64') {
+                            MSBUILD_ARCH = 'amd64';
+                        }
                         let toolPath = path.join(installationPath, `MSBuild\\Current\\Bin\\${MSBUILD_ARCH}\\MSBuild.exe`);
                         core.debug(`Checking for path: ${toolPath}`);
                         if (!fs.existsSync(toolPath)) {
diff --git a/package-lock.json b/package-lock.json
index 2938370..00a3193 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "setup-msbuild",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "setup-msbuild",
-      "version": "1.2.0",
+      "version": "1.3.0",
       "license": "MIT",
       "dependencies": {
         "@actions/core": "^1.10.0",
diff --git a/package.json b/package.json
index cb76856..2ab4da2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "setup-msbuild",
-  "version": "1.2.0",
+  "version": "1.3.1",
   "private": true,
   "description": "Helps set up specific MSBuild tool into PATH for later usage.",
   "main": "lib/main.js",
diff --git a/src/main.ts b/src/main.ts
index 5668bba..b449dc3 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -9,7 +9,7 @@ const IS_WINDOWS = process.platform === 'win32'
 const VS_VERSION = core.getInput('vs-version') || 'latest'
 const VSWHERE_PATH = core.getInput('vswhere-path')
 const ALLOW_PRERELEASE = core.getInput('vs-prerelease') || 'false'
-const MSBUILD_ARCH = core.getInput('msbuild-architecture') || 'x86'
+let MSBUILD_ARCH = core.getInput('msbuild-architecture') || 'x86'
 
 // if a specific version of VS is requested
 let VSWHERE_EXEC = '-products * -requires Microsoft.Component.MSBuild -property installationPath -latest '
@@ -73,6 +73,10 @@ async function run(): Promise<void> {
 
         // x64 and arm64 only exist in one possible location, so no fallback probing
         if (MSBUILD_ARCH === 'x64' || MSBUILD_ARCH === 'arm64') {
+          // x64 is actually amd64 so change to that
+          if (MSBUILD_ARCH === 'x64') {
+            MSBUILD_ARCH = 'amd64'
+          }
           let toolPath = path.join(
             installationPath,
             `MSBuild\\Current\\Bin\\${MSBUILD_ARCH}\\MSBuild.exe`

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