diff --git a/py4DSTEM/process/phase/iterative_base_class.py b/py4DSTEM/process/phase/iterative_base_class.py
index a0ed485ba..8b836eae2 100644
--- a/py4DSTEM/process/phase/iterative_base_class.py
+++ b/py4DSTEM/process/phase/iterative_base_class.py
@@ -342,7 +342,7 @@ def _extract_intensities_and_calibrations_from_datacube(
         # Real-space
         if force_scan_sampling is not None:
             self._scan_sampling = (force_scan_sampling, force_scan_sampling)
-            self._scan_units = "A"
+            self._scan_units = ("A",) * 2
         else:
             if real_space_units == "pixels":
                 if require_calibrations: