diff --git a/src/map/matrix.cpp b/src/map/matrix.cpp
index eae769ad..b04dd0da 100644
--- a/src/map/matrix.cpp
+++ b/src/map/matrix.cpp
@@ -5,9 +5,6 @@
 
 Matrix::~Matrix()
 {
-	if (isNull())
-		return;
-
 	delete[] _m;
 }
 
@@ -35,28 +32,6 @@ Matrix::Matrix(const Matrix& M)
 			m(i,j) = M.m(i,j);
 }
 
-Matrix &Matrix::operator=(const Matrix &M)
-{
-	if (this != &M) {
-		if (_h != M._h || _w != M._w) {
-			if (!isNull())
-				delete[] _m;
-
-			_h = M._h; _w = M._w;
-			if (isNull())
-				_m = 0;
-			else
-				_m = new double[_h * _w];
-		}
-
-		for (size_t i = 0; i < _h; i++)
-			for (size_t j = 0; j < _w; j++)
-				m(i,j) = M.m(i,j);
-	}
-
-	return *this;
-}
-
 bool Matrix::eliminate(double epsilon)
 {
 	size_t i, j, k, maxrow;
diff --git a/src/map/matrix.h b/src/map/matrix.h
index d41e1fb7..86c108d5 100644
--- a/src/map/matrix.h
+++ b/src/map/matrix.h
@@ -13,8 +13,6 @@ public:
 	Matrix(const Matrix& M);
 	~Matrix();
 
-	Matrix &operator=(const Matrix &M);
-
 	size_t h() const {return _h;}
 	size_t w() const {return _w;}
 	double &m(size_t i, size_t j) {return _m[_w * i + j];}
diff --git a/src/map/transform.cpp b/src/map/transform.cpp
index 2d8b264b..ec84ee74 100644
--- a/src/map/transform.cpp
+++ b/src/map/transform.cpp
@@ -53,7 +53,7 @@ void Transform::affine(const QList<ReferencePoint> &points)
 				Q.m(i,j) += v[i] * v[j];
 	}
 
-	Matrix M = Q.augemented(c);
+	Matrix M(Q.augemented(c));
 	if (!M.eliminate()) {
 		_errorString = "Singular transformation matrix";
 		return;