diff -uNr qdigidoc-3.5.1/qtsingleapplication/src/qtlocalpeer.cpp qdigidoc-3.5.1p/qtsingleapplication/src/qtlocalpeer.cpp
--- qdigidoc-3.5.1/qtsingleapplication/src/qtlocalpeer.cpp	2012-03-27 09:48:50.000000000 +0300
+++ qdigidoc-3.5.1p/qtsingleapplication/src/qtlocalpeer.cpp	2012-07-22 16:54:04.122130082 +0300
@@ -57,6 +57,7 @@
 #endif
 #if defined(Q_OS_UNIX)
 #include <time.h>
+#include <unistd.h>
 #endif
 
 namespace QtLP_Private {