diff --git a/src/plugins/qtsupport/debugginghelperbuildtask.cpp b/src/plugins/qtsupport/debugginghelperbuildtask.cpp
index 6a9e4696751dcb19a6bc1af28a7f57dc505cc9d3..19cc1cc42fdae0b2d6c03dfaf38ab1d569beff6e 100644
--- a/src/plugins/qtsupport/debugginghelperbuildtask.cpp
+++ b/src/plugins/qtsupport/debugginghelperbuildtask.cpp
@@ -32,6 +32,7 @@
 #include "qmldumptool.h"
 #include "baseqtversion.h"
 #include "qtversionmanager.h"
+#include <projectexplorer/toolchain.h>
 #include <utils/qtcassert.h>
 
 #include <QCoreApplication>
diff --git a/src/plugins/qtsupport/debugginghelperbuildtask.h b/src/plugins/qtsupport/debugginghelperbuildtask.h
index 19e97f801dfe32c36cd304be27f076436605a60c..4f61b093289039050a1834d95ca5e46435134efb 100644
--- a/src/plugins/qtsupport/debugginghelperbuildtask.h
+++ b/src/plugins/qtsupport/debugginghelperbuildtask.h
@@ -35,12 +35,13 @@
 #include <utils/environment.h>
 #include <utils/fileutils.h>
 #include <coreplugin/messagemanager.h>
-#include <projectexplorer/toolchain.h>
 
 #include <QObject>
 #include <QFutureInterface>
 #include <QMetaType>
 
+namespace ProjectExplorer { class ToolChain; }
+
 namespace QtSupport {
 
 class BaseQtVersion;
diff --git a/src/plugins/qtsupport/qtkitinformation.h b/src/plugins/qtsupport/qtkitinformation.h
index 79dd6f762611b3dfe5225a9331f0d71d57e7d1da..8c5f314c6b4c6db4d262783bf63dab6b15690ef7 100644
--- a/src/plugins/qtsupport/qtkitinformation.h
+++ b/src/plugins/qtsupport/qtkitinformation.h
@@ -35,7 +35,6 @@
 
 #include "baseqtversion.h"
 
-#include <coreplugin/featureprovider.h>
 #include <projectexplorer/kitinformation.h>
 
 namespace Utils { class MacroExpander; }
diff --git a/src/plugins/qtsupport/qtoptionspage.cpp b/src/plugins/qtsupport/qtoptionspage.cpp
index ea6b136a1d1ba368e6e2a054c140c2b12f366e17..3dbfc0ffb9443f8f0ad6927901993a40fe7b136d 100644
--- a/src/plugins/qtsupport/qtoptionspage.cpp
+++ b/src/plugins/qtsupport/qtoptionspage.cpp
@@ -42,6 +42,7 @@
 #include <coreplugin/progressmanager/progressmanager.h>
 #include <coreplugin/coreconstants.h>
 #include <coreplugin/variablechooser.h>
+#include <projectexplorer/toolchain.h>
 #include <projectexplorer/toolchainmanager.h>
 #include <projectexplorer/projectexplorerconstants.h>
 #include <utils/hostosinfo.h>