Index: utils/mlock.cpp
===================================================================
--- utils/mlock.cpp	2010-08-31 12:22:17.000000000 +0000
+++ utils/mlock.cpp	2012-05-09 00:52:06.136011616 +0000
@@ -17,6 +17,7 @@
 #include <cstring>
 #include <iostream>
 #include <sys/mman.h>
+#include <unistd.h>
 
 int main(int argc, char ** argv)
 {