diff --git a/android/image.go b/android/image.go
index 5ec1b16..8424cf8 100644
--- a/android/image.go
+++ b/android/image.go
@@ -14,7 +14,7 @@
 
 package android
 
-// ImageInterface is implemented by modules that need to be split by the ImageMutator.
+// ImageInterface is implemented by modules that need to be split by the imageMutator.
 type ImageInterface interface {
 	// ImageMutatorBegin is called before any other method in the ImageInterface.
 	ImageMutatorBegin(ctx BaseModuleContext)
@@ -48,9 +48,9 @@
 	RecoveryVariation string = "recovery"
 )
 
-// ImageMutator creates variants for modules that implement the ImageInterface that
+// imageMutator creates variants for modules that implement the ImageInterface that
 // allow them to build differently for each partition (recovery, core, vendor, etc.).
-func ImageMutator(ctx BottomUpMutatorContext) {
+func imageMutator(ctx BottomUpMutatorContext) {
 	if ctx.Os() != Android {
 		return
 	}
diff --git a/android/mutator.go b/android/mutator.go
index 0d253eb..eba0e2f 100644
--- a/android/mutator.go
+++ b/android/mutator.go
@@ -89,6 +89,7 @@
 	ctx.BottomUp("os", osMutator).Parallel()
 	ctx.BottomUp("arch", archMutator).Parallel()
 	ctx.TopDown("arch_hooks", archHookMutator).Parallel()
+	ctx.BottomUp("image", imageMutator).Parallel()
 }
 
 var preDeps = []RegisterMutatorFunc{
diff --git a/android/prebuilt_etc_test.go b/android/prebuilt_etc_test.go
index 3855dac..2c4123f 100644
--- a/android/prebuilt_etc_test.go
+++ b/android/prebuilt_etc_test.go
@@ -29,9 +29,6 @@
 	ctx.RegisterModuleType("prebuilt_usr_share_host", PrebuiltUserShareHostFactory)
 	ctx.RegisterModuleType("prebuilt_font", PrebuiltFontFactory)
 	ctx.RegisterModuleType("prebuilt_firmware", PrebuiltFirmwareFactory)
-	ctx.PreDepsMutators(func(ctx RegisterMutatorsContext) {
-		ctx.BottomUp("prebuilt_etc", ImageMutator).Parallel()
-	})
 	ctx.Register()
 	mockFiles := map[string][]byte{
 		"Android.bp": []byte(bp),