diff --git a/EKF/common.h b/EKF/common.h
index c93d440b17..861e6294a5 100644
--- a/EKF/common.h
+++ b/EKF/common.h
@@ -31,8 +31,6 @@
  *
  ****************************************************************************/
 
-#include "Matrix.hpp"
-
 /**
  * @file common.h
  * Definition of base class for attitude estimators