diff --git a/src/libs/clangsupport/clangcodemodelserverproxy.h b/src/libs/clangsupport/clangcodemodelserverproxy.h
index 0ea4b016729..356d0f51f93 100644
--- a/src/libs/clangsupport/clangcodemodelserverproxy.h
+++ b/src/libs/clangsupport/clangcodemodelserverproxy.h
@@ -35,7 +35,6 @@
 
 QT_BEGIN_NAMESPACE
 class QVariant;
-class QProcess;
 class QLocalServer;
 class QLocalSocket;
 QT_END_NAMESPACE
diff --git a/src/plugins/ios/simulatorcontrol.h b/src/plugins/ios/simulatorcontrol.h
index a79c24eab48..b83b0110cd3 100644
--- a/src/plugins/ios/simulatorcontrol.h
+++ b/src/plugins/ios/simulatorcontrol.h
@@ -31,10 +31,6 @@
 #include <QDebug>
 #include <memory>
 
-QT_BEGIN_NAMESPACE
-class QProcess;
-QT_END_NAMESPACE
-
 namespace Ios {
 namespace Internal {
 
diff --git a/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.h b/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.h
index f87f15432cc..7233038b8e2 100644
--- a/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.h
+++ b/src/plugins/qmldesigner/designercore/instances/nodeinstanceserverproxy.h
@@ -36,7 +36,6 @@
 QT_BEGIN_NAMESPACE
 class QLocalServer;
 class QLocalSocket;
-class QProcess;
 QT_END_NAMESPACE
 
 namespace ProjectExplorer {