diff --git a/src/komap.py b/src/komap.py
index d79a26e..5d2ee41 100644
--- a/src/komap.py
+++ b/src/komap.py
@@ -265,7 +265,7 @@ if options.renderer == "mapnik":
       mfile.write(xml_layer("postgis", "polygon", itags, sql, zoom=zoom ))
     else:
       xml_nolayer()
-    for layer_type, entry_types in [("polygon",("way","area")),("line",("way", "line"))]:
+    for layer_type, entry_types in [("line",("way", "line")),("polygon",("way","area"))]:
       index_range = range(-6,7)
       full_layering = conf_full_layering
       if (zoom < 9) or not conf_full_layering :
diff --git a/src/libkomapnik.py b/src/libkomapnik.py
index 73f5a8e..7306655 100644
--- a/src/libkomapnik.py
+++ b/src/libkomapnik.py
@@ -258,6 +258,7 @@ def xml_layer(type="postgis", geom="point", interesting_tags = "*", sql = "true"
         </Parameter>
         %s
         <Parameter name="type">postgis</Parameter>
+        <Parameter name="st_prefix">true</Parameter>
         <Parameter name="user">%s</Parameter>
         <Parameter name="dbname">%s</Parameter>
         <Parameter name="srid">%s</Parameter>
@@ -278,6 +279,7 @@ def xml_layer(type="postgis", geom="point", interesting_tags = "*", sql = "true"
         </Parameter>
         %s
         <Parameter name="type">postgis</Parameter>
+        <Parameter name="st_prefix">true</Parameter>
         <Parameter name="user">%s</Parameter>
         <Parameter name="dbname">%s</Parameter>
         <Parameter name="srid">%s</Parameter>