diff --git a/rust/tool/shared/src/esp.rs b/rust/tool/shared/src/esp.rs
index 3087d4c..e81ef7b 100644
--- a/rust/tool/shared/src/esp.rs
+++ b/rust/tool/shared/src/esp.rs
@@ -16,7 +16,14 @@ pub enum Architecture {
     AArch64,
 }
 
-impl System {
+impl Architecture {
+    pub fn systemd_stub_filename(&self) -> &Path {
+        Path::new(match self {
+            Self::X86 => "linuxx64.efi.stub",
+            Self::AArch64 => "linuxaa64.efi.stub"
+        })
+    }
+
     pub fn systemd_filename(&self) -> &Path {
         Path::new(match self {
             Self::X86 => "systemd-bootx64.efi",