diff --git a/dist/index.js b/dist/index.js
index feea710..ceab42d 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -52305,6 +52305,8 @@ function getTailscaleArch(runnerOS) {
                 return "arm";
             case "X86":
                 return "386";
+            case "RISCV64":
+                return "riscv64";
             default:
                 return "amd64";
         }
diff --git a/src/main.ts b/src/main.ts
index dbc3d1c..b8b6257 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -315,6 +315,8 @@ function getTailscaleArch(runnerOS: string): string {
         return "arm";
       case "X86":
         return "386";
+      case "RISCV64":
+        return "riscv64";
       default:
         return "amd64";
     }