diff --git a/dist/index.js b/dist/index.js
index 089c091..dfd3eee 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -16779,6 +16779,7 @@ class DotnetCoreInstaller {
                 if (IS_WINDOWS) {
                     // This is the default set in install-dotnet.ps1
                     core.addPath(path.join(process.env['LocalAppData'] + '', 'Microsoft', 'dotnet'));
+                    core.exportVariable('DOTNET_ROOT', path.join(process.env['LocalAppData'] + '', 'Microsoft', 'dotnet'));
                 }
                 else {
                     // This is the default set in install-dotnet.sh
diff --git a/src/installer.ts b/src/installer.ts
index a573604..66032fc 100644
--- a/src/installer.ts
+++ b/src/installer.ts
@@ -169,6 +169,10 @@ export class DotnetCoreInstaller {
         core.addPath(
           path.join(process.env['LocalAppData'] + '', 'Microsoft', 'dotnet')
         );
+        core.exportVariable(
+          'DOTNET_ROOT',
+          path.join(process.env['LocalAppData'] + '', 'Microsoft', 'dotnet')
+        );
       } else {
         // This is the default set in install-dotnet.sh
         core.addPath(path.join(process.env['HOME'] + '', '.dotnet'));