diff --git a/util/RTCContext.h b/util/RTCContext.h
index 590e793..2e65cda 100644
--- a/util/RTCContext.h
+++ b/util/RTCContext.h
@@ -13,6 +13,9 @@
 #include <iostream>
 #include <stdio.h>
 #include <unistd.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
 
 #include <Python.h>
 #include <boost/python.hpp>