diff --git a/rtengine/improcfun.cc b/rtengine/improcfun.cc
index 79bd81c653..22efd5484a 100644
--- a/rtengine/improcfun.cc
+++ b/rtengine/improcfun.cc
@@ -2039,9 +2039,9 @@ void ImProcFunctions::rgbProc(Imagefloat* working, LabImage* lab, PipetteBuffer
     };
 
     bool mixchannels = params->chmixer.enabled &&
-                       (params->chmixer.red[0] != 100 || params->chmixer.red[1] != 0     || params->chmixer.red[2] != 0   ||
-                        params->chmixer.green[0] != 0 || params->chmixer.green[1] != 100 || params->chmixer.green[2] != 0 ||
-                        params->chmixer.blue[0] != 0  || params->chmixer.blue[1] != 0    || params->chmixer.blue[2] != 100);
+                       (params->chmixer.red[0] != 1000 || params->chmixer.red[1] != 0     || params->chmixer.red[2] != 0   ||
+                        params->chmixer.green[0] != 0 || params->chmixer.green[1] != 1000 || params->chmixer.green[2] != 0 ||
+                        params->chmixer.blue[0] != 0  || params->chmixer.blue[1] != 0    || params->chmixer.blue[2] != 1000);
 
     FlatCurve* hCurve = nullptr;
     FlatCurve* sCurve = nullptr;