force explicit instantiation of Singleton<> objects
diff --git a/include/utils/Singleton.h b/include/utils/Singleton.h
index 2f7c7c2..bc7626a 100644
--- a/include/utils/Singleton.h
+++ b/include/utils/Singleton.h
@@ -57,6 +57,7 @@
  */
 
 #define ANDROID_SINGLETON_STATIC_INSTANCE(TYPE)             \
+    template class Singleton< TYPE >;                       \
     template< class TYPE > Mutex Singleton< TYPE >::sLock;  \
     template<> TYPE* Singleton< TYPE >::sInstance(0);