diff --git a/tools/droiddoc/src/Android.mk b/tools/droiddoc/src/Android.mk
index c0c583d..abd2581 100644
--- a/tools/droiddoc/src/Android.mk
+++ b/tools/droiddoc/src/Android.mk
@@ -39,6 +39,7 @@
 	LiteralTagInfo.java \
 	MemberInfo.java \
 	MethodInfo.java \
+	NavTree.java \
 	PackageInfo.java \
 	ParamTagInfo.java \
 	ParameterInfo.java \