diff --git a/src/map/transform.cpp b/src/map/transform.cpp
index eaf48a1a..1c9ed5a5 100644
--- a/src/map/transform.cpp
+++ b/src/map/transform.cpp
@@ -72,3 +72,9 @@ Transform::Transform(const QList<ReferencePoint> &points)
 	else
 		affine(points);
 }
+
+QDebug operator<<(QDebug dbg, const ReferencePoint &p)
+{
+	dbg.nospace() << "ReferencePoint(" << p.xy << ", " << p.pp << ")";
+	return dbg.maybeSpace();
+}
diff --git a/src/map/transform.h b/src/map/transform.h
index 939e9bd2..951483bc 100644
--- a/src/map/transform.h
+++ b/src/map/transform.h
@@ -27,4 +27,6 @@ private:
 	QString _errorString;
 };
 
+QDebug operator<<(QDebug dbg, const ReferencePoint &p);
+
 #endif // TRANSFORM_H