diff --git a/Code/IO/otbDEMToImageGenerator.h b/Code/IO/otbDEMToImageGenerator.h
index 5531e74f82dd2fe757a2d024c9037a2cc0a50eae..59bc843248448de7ec7af51d8f43a686ceb60146 100644
--- a/Code/IO/otbDEMToImageGenerator.h
+++ b/Code/IO/otbDEMToImageGenerator.h
@@ -100,6 +100,7 @@ public:
 
   /** Set/Get the Default Unknown Value. */
   itkSetObjectMacro(Transform, GenericRSTransformType);
+  itkGetObjectMacro(Transform, GenericRSTransformType);
   itkGetConstObjectMacro(Transform, GenericRSTransformType);
 
   /** Set the DEM directory. */