diff --git a/CMakeLists.txt b/CMakeLists.txt
index 48ebff9b95..efd2362dfa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -368,6 +368,7 @@ set(kwin_KDEINIT_SRCS
    globalshortcuts.cpp
    input.cpp
    input_event.cpp
+   input_event_spy.cpp
    keyboard_input.cpp
    pointer_input.cpp
    touch_input.cpp
diff --git a/input_event_spy.cpp b/input_event_spy.cpp
index 0b1f5004f4..a7538ab3b2 100644
--- a/input_event_spy.cpp
+++ b/input_event_spy.cpp
@@ -20,6 +20,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "input_event_spy.h"
 #include "input.h"
 
+#include <QPointF>
+#include <QSizeF>
+
 namespace KWin
 {
 
diff --git a/input_event_spy.h b/input_event_spy.h
index 108dca39ec..843e148ffa 100644
--- a/input_event_spy.h
+++ b/input_event_spy.h
@@ -23,6 +23,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include <QtGlobal>
 
+class QPointF;
+class QSizeF;
+
 namespace KWin
 {
 class KeyEvent;