diff --git a/src/Core.h b/src/Core.h
index 6e009b538..cfa67bd3a 100644
--- a/src/Core.h
+++ b/src/Core.h
@@ -7,7 +7,7 @@ namespace Eigen {
 #include "Core/Util.h"
 #include "Core/NumTraits.h"
 #include "Core/MatrixBase.h"
-#include "Core/CopyHelper.h"
+#include "Core/OperatorEquals.h"
 #include "Core/MatrixRef.h"
 #include "Core/MatrixStorage.h"
 #include "Core/Matrix.h"