https://bugs.launchpad.net/gearmand/+bug/1020778

--- gearmand-0.33/util/logfile.cc.orig	2012-05-03 22:51:48.000000000 -0500
+++ gearmand-0.33/util/logfile.cc	2012-07-03 00:53:10.153381199 -0500
@@ -49,6 +49,7 @@
 #include <sstream>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 namespace datadifferential {
 namespace util {