diff --git a/src/sampling/sampledSet/circle/circleSet.C b/src/sampling/sampledSet/circle/circleSet.C
index 6ef83dbed0..cc525f2805 100644
--- a/src/sampling/sampledSet/circle/circleSet.C
+++ b/src/sampling/sampledSet/circle/circleSet.C
@@ -118,7 +118,10 @@ void Foam::circleSet::calcSamples
             samplingCells.append(cellI);
             samplingFaces.append(-1);
             samplingSegments.append(nPoint);
-            samplingCurveDist.append(mag(pt - startPoint_));
+            samplingCurveDist.append
+            (
+                radius*constant::mathematical::pi/180.0*theta
+            );
 
             nPoint++;
         }