diff --git a/rtengine/improcfun.cc b/rtengine/improcfun.cc
index 1661dad93..d005ab52a 100644
--- a/rtengine/improcfun.cc
+++ b/rtengine/improcfun.cc
@@ -3272,7 +3272,7 @@ void ImProcFunctions::chromiLuminanceCurve (int pW, LabImage* lold, LabImage* ln
 
 				float skbeg=-0.05f;//begin hue skin
 				float skend=1.60f;//end hue skin
-				const float chrmin=20.0f;//to avoid artefact, because L curve is not a real curve for luminance
+				const float chrmin=50.0f;//to avoid artefact, because L curve is not a real curve for luminance
 				float aa,bb;
 				float zz=0.0f;
 				float yy=0.0f;
diff --git a/rtgui/ppversion.h b/rtgui/ppversion.h
index 7de11b392..9bb1ca126 100644
--- a/rtgui/ppversion.h
+++ b/rtgui/ppversion.h
@@ -1,12 +1,14 @@
 #ifndef _PPVERSION_
 #define _PPVERSION_
 
-// This number have to be incremented whenever the PP3 file format is modified
-#define PPVERSION 316
+// This number has to be incremented whenever the PP3 file format is modified or the behaviour of a tool changes
+#define PPVERSION 317
 #define PPVERSION_AEXP 301 //value of PPVERSION when auto exposure algorithm was modified
 
 /*
-  Log of version changes
+  Log of version changes
+   317  2014-01-19
+		changes to behaviour of LC curve, Issue 2209
    315  2013-12-12
 		add LH et HH curve to lab mode
    313  2013-11-19