diff --git a/__tests__/cache-restore.test.ts b/__tests__/cache-restore.test.ts
index ab25a72..19f4874 100644
--- a/__tests__/cache-restore.test.ts
+++ b/__tests__/cache-restore.test.ts
@@ -50,7 +50,7 @@ describe('cache-restore tests', () => {
 
       await restoreCache(lockFilePattern);
 
-      const expectedKey = `dotnet-cache-${process.env.RUNNER_OS}-hash`;
+      const expectedKey = `dotnet-cache-${process.env.RUNNER_OS}-${process.arch}-hash`;
       expect(jest.mocked(core.saveState)).toHaveBeenCalledWith(
         'CACHE_KEY',
         expectedKey
@@ -66,7 +66,7 @@ describe('cache-restore tests', () => {
     });
 
     it('calls core.saveState("CACHE_RESULT") when cache.restoreCache() returns key', async () => {
-      const expectedKey = `dotnet-cache-${process.env.RUNNER_OS}-hash`;
+      const expectedKey = `dotnet-cache-${process.env.RUNNER_OS}-${process.arch}-hash`;
       jest.mocked(glob.hashFiles).mockResolvedValue('hash');
       jest.mocked(cache.restoreCache).mockResolvedValue(expectedKey);
 
diff --git a/externals/install-dotnet.sh b/externals/install-dotnet.sh
index 42c201a..caa3ea4 100755
--- a/externals/install-dotnet.sh
+++ b/externals/install-dotnet.sh
@@ -327,6 +327,10 @@ get_machine_architecture() {
             echo "loongarch64"
             return 0
             ;;
+        riscv64)
+            echo "riscv64"
+            return 0
+            ;;
         esac
     fi