diff --git a/gdal/swig/python/gdal-utils/osgeo_utils/gdal2tiles.py b/gdal/swig/python/gdal-utils/osgeo_utils/gdal2tiles.py
index 8b81477a6dfe..820f237fae9e 100644
--- a/gdal/swig/python/gdal-utils/osgeo_utils/gdal2tiles.py
+++ b/gdal/swig/python/gdal-utils/osgeo_utils/gdal2tiles.py
@@ -2872,7 +2872,10 @@ def generate_openlayers(self) -> str:
             args['resolutions'] = '[' + ','.join('%.18g' % res for res in resolutions) + ']'
 
             if self.options.xyz:
-                args['origin'] = '[-180,90]'
+                if self.options.tmscompatible:
+                    args['origin'] = '[-180,90]'
+                else:
+                    args['origin'] = '[-180,270]'
                 args['y_formula'] = 'tileCoord[2]'
             else:
                 args['origin'] = '[-180,-90]'