diff --git a/stages/odm_georeferencing.py b/stages/odm_georeferencing.py
index 6bc86935c..6f86679c8 100644
--- a/stages/odm_georeferencing.py
+++ b/stages/odm_georeferencing.py
@@ -130,9 +130,9 @@ def process(self, args, outputs):
                     f'--filters.transformation.matrix="1 0 0 {utmoffset[0]} 0 1 0 {utmoffset[1]} 0 0 1 0 0 0 0 1"',
                     f'--writers.las.offset_x={reconstruction.georef.utm_east_offset}' ,
                     f'--writers.las.offset_y={reconstruction.georef.utm_north_offset}',
-                    '--writers.las.scale_x={las_scale}',
-                    '--writers.las.scale_y={las_scale}',
-                    '--writers.las.scale_z={las_scale}',
+                    f'--writers.las.scale_x={las_scale}',
+                    f'--writers.las.scale_y={las_scale}',
+                    f'--writers.las.scale_z={las_scale}',
                     '--writers.las.offset_z=0',
                     f'--writers.las.a_srs="{reconstruction.georef.proj4()}"' # HOBU this should maybe be WKT
                 ]