Index: trunk/MagicSoft/Mars/mhcalib/MHCalibrationCam.cc
===================================================================
--- trunk/MagicSoft/Mars/mhcalib/MHCalibrationCam.cc	(revision 5092)
+++ trunk/MagicSoft/Mars/mhcalib/MHCalibrationCam.cc	(revision 5093)
@@ -349,5 +349,5 @@
   // FIXME, this might be done faster and more elegant, by direct copy.
   //
-  MHCalibrationCam *cam = this->Clone();
+  MHCalibrationCam *cam = (MHCalibrationCam*)this->Clone();
 
   cam->fRunNumbers             = fRunNumbers;