diff --git a/src/downloadprogress.h b/src/downloadprogress.h
--- a/src/downloadprogress.h
+++ b/src/downloadprogress.h
@@ -23,10 +23,11 @@
 
 #include <QSharedDataPointer>
 #include <QString>
-#include <QDBusArgument>
 
 #include "globals.h"
 
+class QDBusArgument;
+
 namespace QApt {
 
 class DownloadProgressPrivate;
diff --git a/src/downloadprogress.cpp b/src/downloadprogress.cpp
--- a/src/downloadprogress.cpp
+++ b/src/downloadprogress.cpp
@@ -23,6 +23,7 @@
 // Qt includes
 #include <QSharedData>
 #include <QDBusMetaType>
+#include <QDBusArgument>
 #include <QDebug>
 
 namespace QApt {
diff --git a/src/transaction.h b/src/transaction.h
--- a/src/transaction.h
+++ b/src/transaction.h
@@ -23,11 +23,11 @@
 
 #include <QObject>
 #include <QVariantMap>
-#include <QDBusVariant>
 
 #include "downloadprogress.h"
 
 class QDBusPendingCallWatcher;
+class QDBusVariant;
 
 #ifdef __CURRENTLY_UNIT_TESTING__
 class TransactionErrorHandlingTest;
diff --git a/src/transaction.cpp b/src/transaction.cpp
--- a/src/transaction.cpp
+++ b/src/transaction.cpp
@@ -22,6 +22,8 @@
 
 // Qt includes
 #include <QDBusPendingCallWatcher>
+#include <QDBusVariant>
+
 #include <QDebug>
 
 // Own includes