diff --git a/image_analysis/bragg_prediction/BraggPredictionGPU.cu b/image_analysis/bragg_prediction/BraggPredictionGPU.cu
index 0f4b2789..96fef397 100644
--- a/image_analysis/bragg_prediction/BraggPredictionGPU.cu
+++ b/image_analysis/bragg_prediction/BraggPredictionGPU.cu
@@ -77,7 +77,7 @@ namespace {
         out.h = h;
         out.k = k;
         out.l = l;
-        out.delta_phi = NAN;
+        out.delta_phi_deg = NAN;
         out.predicted_x = x;
         out.predicted_y = y;
         out.d = 1.0f / sqrtf(recip_sq);