--- silicon-1.8.1-src/Silicon/qtsingleapplication/qtlocalpeer.cpp.orig	2012-09-25 21:03:19.027000075 +0200
+++ silicon-1.8.1-src/Silicon/qtsingleapplication/qtlocalpeer.cpp	2012-09-25 21:03:58.894000074 +0200
@@ -56,6 +56,7 @@
 static PProcessIdToSessionId pProcessIdToSessionId = 0;
 #endif
 #if defined(Q_OS_UNIX)
+#include <unistd.h>
 #include <time.h>
 #endif