diff --git a/core/archipelago/src/container/docker_packages.rs b/core/archipelago/src/container/docker_packages.rs
index 83f7ebf5..c27bef56 100644
--- a/core/archipelago/src/container/docker_packages.rs
+++ b/core/archipelago/src/container/docker_packages.rs
@@ -292,6 +292,7 @@ struct AppMetadata {
 }
 
 /// Get the app tier: "core", "recommended", or "optional".
+fn get_app_tier(app_id: &str) -> &'static str {
     match app_id {
         // Core: required for basic Bitcoin node
         "bitcoin" | "bitcoin-core" | "bitcoin-knots" => "core",