diff --git a/common/JFJochReceiverPlots.h b/common/JFJochReceiverPlots.h
index 23d1fc23..3b711a40 100644
--- a/common/JFJochReceiverPlots.h
+++ b/common/JFJochReceiverPlots.h
@@ -129,6 +129,11 @@ public:
     std::vector<float> GetIceRingScoreArray() const;
 
     std::vector<float> GetAzIntProfile() const;
+    // The run-summed profile object itself, rather than the array GetAzIntProfile() flattens it to.
+    // Powder calibration reads the ring positions off it and wants its own GetResult(), which leaves a
+    // bin no pixel fell in as NaN - as 0 it would read as a deep hole in the ring instead. Null before
+    // Setup(); not synchronised, so use it once the run is over rather than while images arrive.
+    [[nodiscard]] const AzimuthalIntegrationProfile *GetAzIntProfileObject() const { return az_int_profile.get(); }
     MultiLinePlot GetAzIntProfilePlot(bool force_1d = false, PlotAzintUnit azint_unit = PlotAzintUnit::Q_recipA) const;
 
     MeanProcessingTime GetMeanProcessingTime() const;