diff --git a/Beams/MRML/vtkMRMLRTBeamNode.cxx b/Beams/MRML/vtkMRMLRTBeamNode.cxx
index 4b1c2120e..56a72411e 100644
--- a/Beams/MRML/vtkMRMLRTBeamNode.cxx
+++ b/Beams/MRML/vtkMRMLRTBeamNode.cxx
@@ -188,6 +188,7 @@ void vtkMRMLRTBeamNode::Copy(vtkMRMLNode *anode)
   vtkMRMLCopyFloatMacro(X2Jaw);
   vtkMRMLCopyFloatMacro(Y1Jaw);
   vtkMRMLCopyFloatMacro(Y2Jaw);
+  vtkMRMLCopyFloatMacro(SAD);
   vtkMRMLCopyFloatMacro(SourceToJawsDistanceX);
   vtkMRMLCopyFloatMacro(SourceToJawsDistanceY);
   vtkMRMLCopyFloatMacro(SourceToMultiLeafCollimatorDistance);
@@ -224,6 +225,7 @@ void vtkMRMLRTBeamNode::CopyContent(vtkMRMLNode *anode, bool deepCopy/*=true*/)
   vtkMRMLCopyFloatMacro(X2Jaw);
   vtkMRMLCopyFloatMacro(Y1Jaw);
   vtkMRMLCopyFloatMacro(Y2Jaw);
+  vtkMRMLCopyFloatMacro(SAD);
   vtkMRMLCopyFloatMacro(SourceToJawsDistanceX);
   vtkMRMLCopyFloatMacro(SourceToJawsDistanceY);
   vtkMRMLCopyFloatMacro(SourceToMultiLeafCollimatorDistance);