diff --git a/src/fcontext.cpp b/src/fcontext.cpp
index 7d3ffcd..6589119 100644
--- a/src/fcontext.cpp
+++ b/src/fcontext.cpp
@@ -10,6 +10,8 @@
 
 #include <cstddef>
 
+#include <boost/cstdint.hpp>
+
 #ifdef BOOST_HAS_ABI_HEADERS
 #  include BOOST_ABI_PREFIX
 #endif