diff --git a/code/3rd_QGLViewer/QGLViewer/keyFrameInterpolator.h b/code/3rd_QGLViewer/QGLViewer/keyFrameInterpolator.h
index eee9c493..beff0891 100644
--- a/code/3rd_QGLViewer/QGLViewer/keyFrameInterpolator.h
+++ b/code/3rd_QGLViewer/QGLViewer/keyFrameInterpolator.h
@@ -1,7 +1,6 @@
 #ifndef QGLVIEWER_KEY_FRAME_INTERPOLATOR_H
 #define QGLVIEWER_KEY_FRAME_INTERPOLATOR_H
 
-#include <QObject>
 #include <QTimer>
 
 #include "quaternion.h"