diff --git a/runtimex.go b/runtimex.go
index 6fb5a87..057eef3 100644
--- a/runtimex.go
+++ b/runtimex.go
@@ -1,3 +1,5 @@
+//go:build arm64 || amd64
+
 // Copyright 2024 CloudWeGo Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/runtimex_other.go b/runtimex_other.go
new file mode 100644
index 0000000..194598b
--- /dev/null
+++ b/runtimex_other.go
@@ -0,0 +1,18 @@
+//go:build !(arm64 || amd64)
+
+package runtimex
+
+import (
+	"fmt"
+	"runtime"
+)
+
+var ErrUnimplemented = fmt.Errorf("runtimex: unimplemented in this platform[%s]", runtime.GOARCH)
+
+func GID() (int, error) {
+	return 0, ErrUnimplemented
+}
+
+func PID() (int, error) {
+	return 0, ErrUnimplemented
+}