diff --git a/include/boost/stacktrace/detail/stacktrace_windows.hpp b/include/boost/stacktrace/detail/stacktrace_windows.hpp
index b2c747c..2825042 100644
--- a/include/boost/stacktrace/detail/stacktrace_windows.hpp
+++ b/include/boost/stacktrace/detail/stacktrace_windows.hpp
@@ -16,6 +16,8 @@
 #include <boost/stacktrace/detail/backtrace_holder_windows.hpp>
 #include <boost/stacktrace/detail/helpers.hpp>
 
+#include <boost/functional/hash.hpp>
+
 namespace boost { namespace stacktrace {
 
 stacktrace::stacktrace() BOOST_NOEXCEPT