diff --git a/src/map/IMG/jls.cpp b/src/map/IMG/jls.cpp
index 23bdd047..3bd6f800 100644
--- a/src/map/IMG/jls.cpp
+++ b/src/map/IMG/jls.cpp
@@ -322,7 +322,7 @@ bool JLS::decode(const SubFile *file, SubFile::Handle &hdl, Matrix<qint16> &img)
 		if (!readLine(bs))
 			return false;
 
-		memcpy(&img.at(i, 0), _current + 1, _w * sizeof(quint16));
+		memcpy(img.row(i), _current + 1, _w * sizeof(quint16));
 
 		quint16 *tmp = _last;
 		_last = _current;
diff --git a/src/map/matrix.h b/src/map/matrix.h
index abd1b1ee..6b4aff42 100644
--- a/src/map/matrix.h
+++ b/src/map/matrix.h
@@ -21,6 +21,7 @@ public:
 	T &at(int n) {return _m[n];}
 	T &at(int i, int j) {return _m[_w * i + j];}
 	T const &at(int i, int j) const {return _m.at(_w * i + j);}
+	T *row(int i) {return &_m[_w * i];}
 
 	bool isNull() const {return (_h == 0 || _w == 0);}
 	int size() const {return _m.size();}