diff --git a/common/DiffractionSpot.cpp b/common/DiffractionSpot.cpp
index 0f71be57..dd8fe53d 100644
--- a/common/DiffractionSpot.cpp
+++ b/common/DiffractionSpot.cpp
@@ -68,9 +68,15 @@ void DiffractionSpot::ConvertToImageCoordinates(const DiffractionExperiment &exp
 SpotToSave DiffractionSpot::Export(const DiffractionGeometry &geometry, int64_t image_num) const {
     auto d = geometry.PxlToRes(x / (float) photons, y / (float) photons);
 
+    float phi = 0.0f;
+    if (geometry.GetRotation()) {
+        phi = geometry.GetRotation()->GetIncrement_deg() * image_num + geometry.GetRotation()->GetWedge_deg();
+    }
+
     return {
         .x = x / static_cast<float>(photons),
         .y = y / static_cast<float>(photons),
+        .phi = phi,
         .intensity = static_cast<float>(photons),
         .maxc = max_photons,
         .d_A = d,
diff --git a/common/SpotToSave.h b/common/SpotToSave.h
index ccdef978..9efb978d 100644
--- a/common/SpotToSave.h
+++ b/common/SpotToSave.h
@@ -9,6 +9,7 @@
 struct SpotToSave {
     float x = 0;
     float y = 0;
+    float phi = 0;
     float intensity = 0;
     int64_t maxc = 0;
     float d_A = 0.0;