diff --git a/include/Spectre/Input/InputDevice.h b/include/Spectre/Input/InputDevice.h
index 14e5995..582a3b5 100644
--- a/include/Spectre/Input/InputDevice.h
+++ b/include/Spectre/Input/InputDevice.h
@@ -2,6 +2,8 @@
 #ifndef SPECTRE_INTPUT_DEVICE_H
 #define SPECTRE_INTPUT_DEVICE_H
 
+#include "InputModule.h"
+
 class InputDevice
 {
 friend class InputModule;