diff --git a/runas_others.go b/runas_others.go
new file mode 100644
index 0000000..a86b038
--- /dev/null
+++ b/runas_others.go
@@ -0,0 +1,13 @@
+//go:build !windows
+
+package runas
+
+import "errors"
+
+func RunElevated(executable, workingDir string, args []string, awaitProcCompletion bool) (int, error) {
+	return 0, errors.New("RunElevated is only supported on Windows")
+}
+
+func IsAdminProcess() (bool, error) {
+	return false, errors.New("IsAdminProcess is only supported on Windows")
+}
diff --git a/runas.go b/runas_windows.go
similarity index 97%
rename from runas.go
rename to runas_windows.go
index 9b614d6..143ae2c 100644
--- a/runas.go
+++ b/runas_windows.go
@@ -148,6 +148,6 @@ func RunElevated(executable, workingDir string, args []string, awaitProcCompleti
 
 // IsAdminProcess returns true if the current process already
 // runs as admin.
-func IsAdminProcess() bool {
-	return windows.GetCurrentProcessToken().IsElevated()
+func IsAdminProcess() (bool, error) {
+	return windows.GetCurrentProcessToken().IsElevated(), nil
 }