diff --git a/include/pdal/Log.hpp b/include/pdal/Log.hpp
index 4c2cf522ac..287bf51ca5 100644
--- a/include/pdal/Log.hpp
+++ b/include/pdal/Log.hpp
@@ -34,6 +34,7 @@
 
 #pragma once
 
+#include <memory> // shared_ptr
 #include <stack>
 
 #include <pdal/pdal_internal.hpp>