From 9bb75937cc698b32f2fe6ffac3b4e09a89c3c5f7 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Mon, 6 Sep 2010 11:51:42 +0200
Subject: fix += return by value like operations

---
 Eigen/src/Core/CwiseBinaryOp.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Eigen/src/Core/CwiseBinaryOp.h')

diff --git a/Eigen/src/Core/CwiseBinaryOp.h b/Eigen/src/Core/CwiseBinaryOp.h
index 171140c27..5def0db2a 100644
--- a/Eigen/src/Core/CwiseBinaryOp.h
+++ b/Eigen/src/Core/CwiseBinaryOp.h
@@ -216,7 +216,7 @@ EIGEN_STRONG_INLINE Derived &
 MatrixBase<Derived>::operator-=(const MatrixBase<OtherDerived> &other)
 {
   SelfCwiseBinaryOp<ei_scalar_difference_op<Scalar>, Derived, OtherDerived> tmp(derived());
-  tmp = other;
+  tmp = other.derived();
   return derived();
 }
 
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