diff --git a/rtengine/dcrop.cc b/rtengine/dcrop.cc
index 0b5198c3c..2d376044e 100644
--- a/rtengine/dcrop.cc
+++ b/rtengine/dcrop.cc
@@ -807,7 +807,7 @@ void Crop::update(int todo)
 
     }
 
-    if (todo & M_AUTOEXP) {
+    if (todo & (M_AUTOEXP | M_RGBCURVE)) {
         if (params.icm.workingTRC == "Custom") { //exec TRC IN free
             Glib::ustring profile;
             profile = params.icm.workingProfile;
diff --git a/rtengine/improccoordinator.cc b/rtengine/improccoordinator.cc
index 50cab329d..3e9d7ab8f 100644
--- a/rtengine/improccoordinator.cc
+++ b/rtengine/improccoordinator.cc
@@ -497,7 +497,7 @@ void ImProcCoordinator::updatePreviewImage(int todo, Crop* cropCall)
 
     progress("Exposure curve & CIELAB conversion...", 100 * readyphase / numofphases);
 
-    if (todo &  M_AUTOEXP) {
+    if (todo &  (M_AUTOEXP | M_RGBCURVE)) {
         if (params.icm.workingTRC == "Custom") { //exec TRC IN free
             Glib::ustring profile;
             profile = params.icm.workingProfile;