diff --git a/jdaviz/configs/cubeviz/plugins/spectral_extraction/spectral_extraction.py b/jdaviz/configs/cubeviz/plugins/spectral_extraction/spectral_extraction.py
index 851a9bae37..60efef7db9 100644
--- a/jdaviz/configs/cubeviz/plugins/spectral_extraction/spectral_extraction.py
+++ b/jdaviz/configs/cubeviz/plugins/spectral_extraction/spectral_extraction.py
@@ -204,6 +204,9 @@ def _update_mark_scale(self, *args):
             self.aperture.scale_factor = 1.0
         else:
             self.aperture.scale_factor = self.slice_wavelength/self.reference_wavelength
+
+        self.app._metadata['_pixel_scale_factor'] = self.aperture.scale_factor
+
         if not self.bg_wavelength_dependent:
             self.background.scale_factor = 1.0
         else: