diff --git a/java/droiddoc.go b/java/droiddoc.go
index 098400b..959f1c7 100644
--- a/java/droiddoc.go
+++ b/java/droiddoc.go
@@ -534,6 +534,9 @@
 		ctx.AddMissingDependencies(sdkDep.java9Classpath)
 	} else if sdkDep.useFiles {
 		deps.bootClasspath = append(deps.bootClasspath, sdkDep.jars...)
+		deps.aidlPreprocess = sdkDep.aidl
+	} else {
+		deps.aidlPreprocess = sdkDep.aidl
 	}
 
 	ctx.VisitDirectDeps(func(module android.Module) {