diff --git a/src/rascal/calibrator.py b/src/rascal/calibrator.py
index 0673c22..b711ef7 100644
--- a/src/rascal/calibrator.py
+++ b/src/rascal/calibrator.py
@@ -1115,7 +1115,7 @@ def set_hough_properties(
             )
         ) / np.ptp(self.pixel_list)
 
-        if self.atlas is not None:
+        if (self.atlas is not None) and (self.peaks is not None):
             self._generate_pairs()
 
     def set_ransac_properties(