diff --git a/PyNutil/main.py b/PyNutil/main.py
index 31b2af65dea9338225ebc9f5ae85cdc377d7259e..4de8f3e1e657d07776d5f8f8149b42178fdf1bf1 100644
--- a/PyNutil/main.py
+++ b/PyNutil/main.py
@@ -65,7 +65,7 @@ class PyNutil:
         if method not in ["per_pixel", "per_object", "all"]:
             raise ValueError(f"method {method} not recognised, valid methods are: per_pixel, per_object, or all")
         print("extracting coordinates")
-        points = FolderToAtlasSpaceMultiThreaded(
+        points = FolderToAtlasSpace(
             self.segmentation_folder,
             self.alignment_json,
             pixelID=self.colour,