diff --git a/android/mutator.go b/android/mutator.go
index e20bc2c..04407eb 100644
--- a/android/mutator.go
+++ b/android/mutator.go
@@ -78,11 +78,13 @@
 	RegisterDefaultsPreArchMutators,
 }
 
+func registerArchMutator(ctx RegisterMutatorsContext) {
+	ctx.BottomUp("arch", archMutator).Parallel()
+	ctx.TopDown("arch_hooks", archHookMutator).Parallel()
+}
+
 var preDeps = []RegisterMutatorFunc{
-	func(ctx RegisterMutatorsContext) {
-		ctx.BottomUp("arch", archMutator).Parallel()
-		ctx.TopDown("arch_hooks", archHookMutator).Parallel()
-	},
+	registerArchMutator,
 }
 
 var postDeps = []RegisterMutatorFunc{