diff --git a/rtengine/improccoordinator.cc b/rtengine/improccoordinator.cc
index 2c504c5f5..832d193a2 100644
--- a/rtengine/improccoordinator.cc
+++ b/rtengine/improccoordinator.cc
@@ -896,7 +896,7 @@ void ImProcCoordinator::updatePreviewImage(int todo, bool panningRelatedChange)
 
     // process crop, if needed
     for (size_t i = 0; i < crops.size(); i++)
-        if (crops[i]->hasListener() && (panningRelatedChange || (todo & M_MONITOR) || crops[i]->get_skip() == 1)) {
+        if (crops[i]->hasListener() && (panningRelatedChange || (todo & (M_MONITOR | M_RGBCURVE | M_LUMACURVE)) || crops[i]->get_skip() == 1)) {
             crops[i]->update(todo);     // may call ourselves
         }