diff --git a/src/dials/algorithms/spot_prediction/__init__.py b/src/dials/algorithms/spot_prediction/__init__.py
index c427fcbb99..8073b7544c 100644
--- a/src/dials/algorithms/spot_prediction/__init__.py
+++ b/src/dials/algorithms/spot_prediction/__init__.py
@@ -271,3 +271,6 @@ def for_ub(self, ub):
 
     def for_reflection_table(self, reflections, UB):
         return self.predictor.for_reflection_table(reflections, UB)
+
+    def all_reflections_for_asu(self, phi):
+        return self.predictor.all_reflections_for_asu(float(phi))