diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index e256fda80..203efacad 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -8865,7 +8865,7 @@ void ImProcFunctions::DeNoise(int call, float * slidL, float * slida, float * sl
                             }
                         }
 
-                    if(lp.enablMask && lp.lnoiselow !=1.f) {
+                    if(lp.enablMask && lp.lnoiselow !=1.f && lp.smasktyp != 0) {
                         //this code has been reviewed by Ingo in september 2020 PR5903
                         float hig = lp.thrhigh;
                         if(lp.thrhigh < lp.thrlow) {
@@ -9466,7 +9466,7 @@ void ImProcFunctions::DeNoise(int call, float * slidL, float * slida, float * sl
                                 }
                             }
                             
-                    if(lp.enablMask && lp.lnoiselow != 1.f) {
+                    if(lp.enablMask && lp.lnoiselow != 1.f  && lp.smasktyp != 0) {
                          //this code has been reviewed by Ingo in september 2020 PR5903
                          //i just change parameters to better progressivity
                         float hig = lp.thrhigh;
diff --git a/rtengine/procparams.cc b/rtengine/procparams.cc
index cdf48cef0..52478bfd3 100644
--- a/rtengine/procparams.cc
+++ b/rtengine/procparams.cc
@@ -3367,7 +3367,7 @@ LocallabParams::LocallabSpot::LocallabSpot() :
         0.35,
         0.35
     },
-    showmaskblMethodtyp("blur"),
+    showmaskblMethodtyp("nois"),
     CCmaskblcurve{
         static_cast<double>(FCT_MinMaxCPoints),
         0.0,
diff --git a/rtgui/locallabtools.cc b/rtgui/locallabtools.cc
index 1bf32a84b..cb4fc3312 100644
--- a/rtgui/locallabtools.cc
+++ b/rtgui/locallabtools.cc
@@ -5949,7 +5949,7 @@ LocallabBlur::LocallabBlur():
     showmaskblMethodtyp->append(M("TP_LOCALLAB_SHOWMASKTYP1"));
     showmaskblMethodtyp->append(M("TP_LOCALLAB_SHOWMASKTYP2"));
     showmaskblMethodtyp->append(M("TP_LOCALLAB_SHOWMASKTYP3"));
-    showmaskblMethodtyp->set_active(0);
+    showmaskblMethodtyp->set_active(1);
     showmaskblMethodtypConn = showmaskblMethodtyp->signal_changed().connect(sigc::mem_fun(*this, &LocallabBlur::showmaskblMethodtypChanged));
 
     enablMaskConn = enablMask->signal_toggled().connect(sigc::mem_fun(*this, &LocallabBlur::enablMaskChanged));
@@ -6691,6 +6691,11 @@ void LocallabBlur::adjusterChanged(Adjuster* a, double newval)
         }
 
         if (a == lnoiselow) {
+            if(lnoiselow->getValue()!= 1.) {
+                if (showmaskblMethodtyp->get_active_row_number() == 0) {
+                    showmaskblMethodtyp->set_active(2);
+                }
+            }
             if (listener) {
                 listener->panelChanged(Evlocallablnoiselow,
                                        lnoiselow->getTextValue() + " (" + escapeHtmlChars(spotName) + ")");
@@ -6938,7 +6943,7 @@ void LocallabBlur::convertParamToSimple()
     } else if (defSpot.showmaskblMethodtyp == "all") {
         showmaskblMethodtyp->set_active(2);
     }
-
+    lnoiselow->setValue(defSpot.lnoiselow);
     enablMask->set_active(defSpot.enablMask);
     CCmaskblshape->setCurve(defSpot.CCmaskblcurve);
     LLmaskblshape->setCurve(defSpot.LLmaskblcurve);
@@ -6982,6 +6987,11 @@ void LocallabBlur::updateGUIToMode(const modeType new_type)
             // Specific Simple mode widgets are shown in Normal mode
             expmaskbl->show();
             expdenoise1->show();
+            if(lnoiselow->getValue()!= 1.) {
+                if (showmaskblMethodtyp->get_active_row_number() == 0) {
+                    showmaskblMethodtyp->set_active(2);
+                }
+            }
 
             break;
 
@@ -7001,6 +7011,12 @@ void LocallabBlur::updateGUIToMode(const modeType new_type)
             shadmaskblsha->show();
             mask2blCurveEditorGwav->show();
             csThresholdblur->show();
+            if(lnoiselow->getValue()!= 1.) {
+                if (showmaskblMethodtyp->get_active_row_number() == 0) {
+                    showmaskblMethodtyp->set_active(2);
+                }
+            }
+            
     }
 }
 
@@ -7177,6 +7193,12 @@ void LocallabBlur::showmaskblMethodChanged()
 
 void LocallabBlur::showmaskblMethodtypChanged()
 {
+    if(lnoiselow->getValue()!= 1.) {
+        if (showmaskblMethodtyp->get_active_row_number() == 0) {
+            showmaskblMethodtyp->set_active(2);
+        }
+    }
+
     // If mask preview is activated, deactivate all other tool mask preview
     if (locToolListener) {
         locToolListener->resetOtherMaskView(this);