diff --git a/common/include/pcl/make_shared.h b/common/include/pcl/make_shared.h
index 30f6451038e..213ece4e803 100644
--- a/common/include/pcl/make_shared.h
+++ b/common/include/pcl/make_shared.h
@@ -69,6 +69,9 @@ shared_ptr<T> make_shared(Args&&... args);
 
 #else
 
+template <typename T>
+struct has_custom_allocator;
+
 template<typename T, typename ... Args>
 std::enable_if_t<has_custom_allocator<T>::value, shared_ptr<T>> make_shared(Args&&... args)
 {