diff --git a/Point_set_processing_3/include/CGAL/point_set_processing_assertions.h b/Point_set_processing_3/include/CGAL/point_set_processing_assertions.h
index fecb08b9052..37397a99071 100644
--- a/Point_set_processing_3/include/CGAL/point_set_processing_assertions.h
+++ b/Point_set_processing_3/include/CGAL/point_set_processing_assertions.h
@@ -370,4 +370,10 @@
 #  define CGAL_point_set_processing_expensive_exactness_warnings 1
 #endif // CGAL_POINT_SET_PROCESSING_NO_WARNINGS
 
+#undef CGAL_POINT_SET_PROCESSING_DEPRECATED_V1_API
+  
+#define CGAL_POINT_SET_PROCESSING_DEPRECATED_V1_API(FCT)                \
+  std::cerr << "Warning: you are using the deprecated V1 API of the Point Set Processing\n function " \
+            << FCT << ", please update your code." << std::endl
+
 /// \endcond