diff --git a/src/posix_api.cpp b/src/posix_api.cpp
index 95978e43..cab93854 100644
--- a/src/posix_api.cpp
+++ b/src/posix_api.cpp
@@ -21,6 +21,7 @@
 #include <boost/config.hpp>
 #include <boost/regex.hpp>
 #include <boost/cregex.hpp>
+#include <boost/cstdint.hpp>
 #include <cstdio>
 
 #if defined(BOOST_NO_STDC_NAMESPACE)
diff --git a/src/wide_posix_api.cpp b/src/wide_posix_api.cpp
index abd68c59..50d1b18d 100644
--- a/src/wide_posix_api.cpp
+++ b/src/wide_posix_api.cpp
@@ -24,6 +24,7 @@
 
 #include <boost/regex.hpp>
 #include <boost/cregex.hpp>
+#include <boost/cstdint.hpp>
 
 #include <cstdio>
 #include <cstring>