diff --git a/src/plugins/alsa/qalsaaudioinput.h b/src/plugins/alsa/qalsaaudioinput.h
index abf67e2c..19af6895 100644
--- a/src/plugins/alsa/qalsaaudioinput.h
+++ b/src/plugins/alsa/qalsaaudioinput.h
@@ -54,6 +54,7 @@
 #include <QtCore/qstring.h>
 #include <QtCore/qstringlist.h>
 #include <QtCore/qdatetime.h>
+#include <QtCore/qiodevice.h>
 
 #include <QtMultimedia/qaudio.h>
 #include <QtMultimedia/qaudiodeviceinfo.h>
diff --git a/src/plugins/alsa/qalsaaudiooutput.h b/src/plugins/alsa/qalsaaudiooutput.h
index 2a245f38..243729f7 100644
--- a/src/plugins/alsa/qalsaaudiooutput.h
+++ b/src/plugins/alsa/qalsaaudiooutput.h
@@ -53,6 +53,7 @@
 #include <QtCore/qstring.h>
 #include <QtCore/qstringlist.h>
 #include <QtCore/qdatetime.h>
+#include <QtCore/qiodevice.h>
 
 #include <QtMultimedia/qaudio.h>
 #include <QtMultimedia/qaudiodeviceinfo.h>
diff --git a/src/plugins/opensles/qopenslesaudiooutput.h b/src/plugins/opensles/qopenslesaudiooutput.h
index f36a5bf0..afb829f7 100644
--- a/src/plugins/opensles/qopenslesaudiooutput.h
+++ b/src/plugins/opensles/qopenslesaudiooutput.h
@@ -39,6 +39,7 @@
 #include <qbytearray.h>
 #include <qmap.h>
 #include <QTime>
+#include <QIODevice>
 
 QT_BEGIN_NAMESPACE
 
diff --git a/src/plugins/pulseaudio/qaudioinput_pulse.h b/src/plugins/pulseaudio/qaudioinput_pulse.h
index 2d9cbc9f..4e92447f 100644
--- a/src/plugins/pulseaudio/qaudioinput_pulse.h
+++ b/src/plugins/pulseaudio/qaudioinput_pulse.h
@@ -50,6 +50,7 @@
 #include <QtCore/qstring.h>
 #include <QtCore/qstringlist.h>
 #include <QtCore/qdatetime.h>
+#include <QtCore/qiodevice.h>
 
 #include "qaudio.h"
 #include "qaudiodeviceinfo.h"
diff --git a/src/plugins/pulseaudio/qaudiooutput_pulse.h b/src/plugins/pulseaudio/qaudiooutput_pulse.h
index a8e26345..2883ae5c 100644
--- a/src/plugins/pulseaudio/qaudiooutput_pulse.h
+++ b/src/plugins/pulseaudio/qaudiooutput_pulse.h
@@ -50,6 +50,7 @@
 #include <QtCore/qstring.h>
 #include <QtCore/qstringlist.h>
 #include <QtCore/qdatetime.h>
+#include <QtCore/qiodevice.h>
 
 #include "qaudio.h"
 #include "qaudiodeviceinfo.h"
diff --git a/src/plugins/qnx-audio/audio/qnxaudioinput.h b/src/plugins/qnx-audio/audio/qnxaudioinput.h
index aa43ee79..9ccc1958 100644
--- a/src/plugins/qnx-audio/audio/qnxaudioinput.h
+++ b/src/plugins/qnx-audio/audio/qnxaudioinput.h
@@ -37,6 +37,7 @@
 #include "qaudiosystem.h"
 
 #include <QSocketNotifier>
+#include <QIODevice>
 #include <QTime>
 #include <QTimer>
 
diff --git a/src/plugins/qnx-audio/audio/qnxaudiooutput.h b/src/plugins/qnx-audio/audio/qnxaudiooutput.h
index dfab12d5..8bb671a3 100644
--- a/src/plugins/qnx-audio/audio/qnxaudiooutput.h
+++ b/src/plugins/qnx-audio/audio/qnxaudiooutput.h
@@ -38,6 +38,7 @@
 
 #include <QTime>
 #include <QTimer>
+#include <QIODevice>
 
 #include <sys/asoundlib.h>
 
diff --git a/src/plugins/windowsaudio/qwindowsaudiodeviceinfo.cpp b/src/plugins/windowsaudio/qwindowsaudiodeviceinfo.cpp
index 4f8f0383..12d9d1e3 100644
--- a/src/plugins/windowsaudio/qwindowsaudiodeviceinfo.cpp
+++ b/src/plugins/windowsaudio/qwindowsaudiodeviceinfo.cpp
@@ -44,6 +44,7 @@
 
 
 #include <QtCore/qt_windows.h>
+#include <QtCore/QDataStream>
 #include <mmsystem.h>
 #include "qwindowsaudiodeviceinfo.h"
 
diff --git a/src/plugins/windowsaudio/qwindowsaudioinput.cpp b/src/plugins/windowsaudio/qwindowsaudioinput.cpp
index 2a3d3429..a5fcf7f5 100644
--- a/src/plugins/windowsaudio/qwindowsaudioinput.cpp
+++ b/src/plugins/windowsaudio/qwindowsaudioinput.cpp
@@ -45,6 +45,8 @@
 
 #include "qwindowsaudioinput.h"
 
+#include <QtCore/QDataStream>
+
 QT_BEGIN_NAMESPACE
 
 //#define DEBUG_AUDIO 1
diff --git a/src/plugins/windowsaudio/qwindowsaudiooutput.cpp b/src/plugins/windowsaudio/qwindowsaudiooutput.cpp
index a9230139..591b3c7f 100644
--- a/src/plugins/windowsaudio/qwindowsaudiooutput.cpp
+++ b/src/plugins/windowsaudio/qwindowsaudiooutput.cpp
@@ -44,6 +44,7 @@
 
 #include "qwindowsaudiooutput.h"
 #include <QtEndian>
+#include <QtCore/QDataStream>
 
 #ifndef SPEAKER_FRONT_LEFT
     #define SPEAKER_FRONT_LEFT            0x00000001