diff --git a/register_unix.go b/register_unix.go
index fb860ee..f9e35c9 100644
--- a/register_unix.go
+++ b/register_unix.go
@@ -11,13 +11,13 @@ import (
 )
 
 // RegisterApp is not supported on non-Windows platforms.
-func RegisterApp() {
-	fmt.Println("[WARN] RegisterApp() is only available on Windows")
+func RegisterApp() error {
+	return fmt.Errorf("[WARN] RegisterApp() is only available on Windows")
 }
 
 // UnregisterApp is not supported on non-Windows platforms.
-func UnregisterApp() {
-	fmt.Println("[WARN] UnregisterApp() is only available on Windows")
+func UnregisterApp() error {
+	return fmt.Errorf("[WARN] UnregisterApp() is only available on Windows")
 }
 
 // IsRegistered returns true if the application is detected as installed.