diff --git a/cc/cc.go b/cc/cc.go
index 02fc239..139e85f 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -34,9 +34,9 @@
 	android.RegisterModuleType("cc_defaults", defaultsFactory)
 
 	android.PreDepsMutators(func(ctx android.RegisterMutatorsContext) {
-		ctx.BottomUp("image", imageMutator).Parallel()
+		ctx.BottomUp("image", ImageMutator).Parallel()
 		ctx.BottomUp("link", LinkageMutator).Parallel()
-		ctx.BottomUp("vndk", vndkMutator).Parallel()
+		ctx.BottomUp("vndk", VndkMutator).Parallel()
 		ctx.BottomUp("ndk_api", ndkApiMutator).Parallel()
 		ctx.BottomUp("test_per_src", testPerSrcMutator).Parallel()
 		ctx.BottomUp("version", VersionMutator).Parallel()
@@ -1792,7 +1792,7 @@
 	}
 }
 
-func imageMutator(mctx android.BottomUpMutatorContext) {
+func ImageMutator(mctx android.BottomUpMutatorContext) {
 	if mctx.Os() != android.Android {
 		return
 	}