diff --git a/src/komap.py b/src/komap.py
index c68435b..3cbc964 100644
--- a/src/komap.py
+++ b/src/komap.py
@@ -722,8 +722,8 @@ if options.renderer == "mapnik":
                         ST_Translate(
                           ST_Rotate(
                             ST_GeomFromEWKT('SRID=900913;LINESTRING(-50 0, 50 0)'),
-                            -1*ST_Azimuth(ST_PointN(ST_ShortestLine(l.way, ST_PointOnSurface(h.way)),1),
-                                          ST_PointN(ST_ShortestLine(l.way, ST_PointOnSurface(h.way)),2)
+                            -1*ST_Azimuth(ST_PointN(ST_ShortestLine(ST_Centroid(l.way), ST_PointOnSurface(h.way)),1),
+                                          ST_PointN(ST_ShortestLine(ST_Centroid(l.way), ST_PointOnSurface(h.way)),2)
                                         )
                           ),
                           ST_X(ST_PointOnSurface(ST_Buffer(h.way,0.1))),