diff --git a/rtgui/crophandler.cc b/rtgui/crophandler.cc
index 0abff627b..6228cb1c7 100644
--- a/rtgui/crophandler.cc
+++ b/rtgui/crophandler.cc
@@ -411,7 +411,7 @@ void CropHandler::setDetailedCrop (IImage8* im, IImage8* imtrue, rtengine::procp
             return FALSE;
         };
 
-        idle_register.add(func, idle_helper);
+        idle_register.add(func, idle_helper, G_PRIORITY_HIGH_IDLE);
     }
 
     cimg.unlock ();