Index: src/systeminfo/linux/qsysteminfo_linux.cpp
===================================================================
--- a/src/systeminfo/linux/qsysteminfo_linux.cpp
+++ b/src/systeminfo/linux/qsysteminfo_linux.cpp	2012-06-29 17:14:34.244456338 +0200
@@ -39,10 +39,14 @@
 **
 ****************************************************************************/
 
+// own includes
 #include "linux/qsysteminfo_linux_p.h"
 
 #include "qsysteminfo_dbus_p.h"
 
+// system includes
+#include <unistd.h>
+
 #if !defined(Q_WS_MAEMO_6)
 #if defined(Q_WS_X11)
 #include <QX11Info>
Index: plugins/multimedia/pulseaudio/qaudioinput_pulse.cpp
===================================================================
--- a/plugins/multimedia/pulseaudio/qaudioinput_pulse.cpp
+++ b/plugins/multimedia/pulseaudio/qaudioinput_pulse.cpp	2012-06-29 17:23:46.231774356 +0200
@@ -47,6 +47,8 @@
 #include "qpulseaudioengine.h"
 #include "qpulsehelpers.h"
 
+#include <unistd.h>
+
 QT_BEGIN_NAMESPACE
 
 const int PeriodTimeMs = 50;
Index: plugins/multimedia/pulseaudio/qaudiooutput_pulse.cpp
===================================================================
--- a/plugins/multimedia/pulseaudio/qaudiooutput_pulse.cpp
+++ b/plugins/multimedia/pulseaudio/qaudiooutput_pulse.cpp	2012-06-29 17:21:07.749679369 +0200
@@ -47,6 +47,8 @@
 #include "qpulseaudioengine.h"
 #include "qpulsehelpers.h"
 
+#include <unistd.h>
+
 QT_BEGIN_NAMESPACE
 
 const int PeriodTimeMs = 20;
Index: plugins/multimedia/pulseaudio/qpulseaudioengine.cpp
===================================================================
--- a/plugins/multimedia/pulseaudio/qpulseaudioengine.cpp
+++ b/plugins/multimedia/pulseaudio/qpulseaudioengine.cpp	2012-06-29 17:24:09.672083827 +0200
@@ -47,6 +47,8 @@
 #include "qaudiooutput_pulse.h"
 #include "qpulsehelpers.h"
 
+#include <unistd.h>
+
 QT_BEGIN_NAMESPACE
 
 static void serverInfoCallback(pa_context *context, const pa_server_info *info, void *userdata)