diff --git a/rtengine/procparams.cc b/rtengine/procparams.cc
index 8e99f5b54..726d69347 100644
--- a/rtengine/procparams.cc
+++ b/rtengine/procparams.cc
@@ -8324,7 +8324,15 @@ int ProcParams::load(const Glib::ustring& fname, ParamsEdited* pedited)
             assignFromKeyfile(keyFile, "Dehaze", "Strength", pedited, dehaze.strength, pedited->dehaze.strength);
             assignFromKeyfile(keyFile, "Dehaze", "ShowDepthMap", pedited, dehaze.showDepthMap, pedited->dehaze.showDepthMap);
             assignFromKeyfile(keyFile, "Dehaze", "Depth", pedited, dehaze.depth, pedited->dehaze.depth);
-            assignFromKeyfile(keyFile, "Dehaze", "Saturation", pedited, dehaze.saturation, pedited->dehaze.saturation);
+            if (ppVersion < 349 && dehaze.enabled && keyFile.has_key("Dehaze", "Luminance")) {
+                const bool luminance = keyFile.get_boolean("Dehaze", "Luminance");
+                dehaze.saturation = luminance ? 0 : 100;
+                if (pedited) {
+                    pedited->dehaze.saturation = true;
+                }
+            } else {
+                assignFromKeyfile(keyFile, "Dehaze", "Saturation", pedited, dehaze.saturation, pedited->dehaze.saturation);
+            }
         }
         
         if (keyFile.has_group("Film Simulation")) {
diff --git a/rtgui/ppversion.h b/rtgui/ppversion.h
index 5aef01806..162e63f9e 100644
--- a/rtgui/ppversion.h
+++ b/rtgui/ppversion.h
@@ -1,11 +1,13 @@
 #pragma once
 
 // This number has to be incremented whenever the PP3 file format is modified or the behaviour of a tool changes
-#define PPVERSION 348
+#define PPVERSION 349
 #define PPVERSION_AEXP 301 //value of PPVERSION when auto exposure algorithm was modified
 
 /*
   Log of version changes
+   349  2020-10-29
+        replaced Haze removal Luminance checkbox with an adjuster to blend between luminance and normal mode
    348  2018-09-25
         Added Locallab tool parameters 	
    347  2019-11-17