diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index a5e8fb000..95e52c379 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -463,7 +463,7 @@ static void calcLocalParams(int sp, int oW, int oH, const LocallabParams& locall
     float blurexpo = (float) locallab.spots.at(sp).blurexpde;
     float blurcolor = (float) locallab.spots.at(sp).blurcolde;
     int local_transit = locallab.spots.at(sp).transit;
-    double radius = (double) locallab.spots.at(sp).radius;
+    double radius = locallab.spots.at(sp).radius;
     double sharradius = ((double) locallab.spots.at(sp).sharradius);
     double lcamount = ((double) locallab.spots.at(sp).lcamount);
     double sharblurr = ((double) locallab.spots.at(sp).sharblur);
@@ -4601,7 +4601,7 @@ void ImProcFunctions::Lab_Local(int call, int sp, float** shbuffer, LabImage * o
             noiscfactiv = false;
         }
 
-        if (lp.inv || lp.invret  || lp.invex) { //exterior || lp.curvact
+        if (lp.inv || lp.invret  || lp.invex) { //exterior
             ave = 0.f;
             n = 0;
             #pragma omp parallel for reduction(+:ave,n)
diff --git a/rtengine/procparams.cc b/rtengine/procparams.cc
index ae21bcd86..90a81c20b 100644
--- a/rtengine/procparams.cc
+++ b/rtengine/procparams.cc
@@ -2420,7 +2420,7 @@ LocallabParams::LocallabSpot::LocallabSpot() :
     explabregion(false),
     // Blur & Noise
     expblur(false),
-    radius(1),
+    radius(1.0),
     strength(0),
     sensibn(40),
     blurMethod("norm"),
diff --git a/rtengine/procparams.h b/rtengine/procparams.h
index bd6aa97f5..d98e5ca55 100644
--- a/rtengine/procparams.h
+++ b/rtengine/procparams.h
@@ -1022,7 +1022,7 @@ struct LocallabParams {
         // ColorToningParams::LabCorrectionRegion Labcorr;
         // Blur & Noise
         bool expblur;
-        int radius;
+        double radius;
         int strength;
         int sensibn;
         Glib::ustring blurMethod;
diff --git a/rtgui/locallab.cc b/rtgui/locallab.cc
index 9aea2030c..30d06ad2f 100644
--- a/rtgui/locallab.cc
+++ b/rtgui/locallab.cc
@@ -101,7 +101,7 @@ Locallab::Locallab():
     streng(Gtk::manage(new Adjuster(M("TP_LOCALLAB_STRENG"), 1, 100, 1, 1))),
     sensisf(Gtk::manage(new Adjuster(M("TP_LOCALLAB_SENSI"), 1, 100, 1, 15))),
     // Blur & Noise
-    radius(Gtk::manage(new Adjuster(M("TP_LOCALLAB_RADIUS"), 1, 100, 1, 1))),
+    radius(Gtk::manage(new Adjuster(M("TP_LOCALLAB_RADIUS"), 1.0, 100.0, 0.1, 1.0))),
     strength(Gtk::manage(new Adjuster(M("TP_LOCALLAB_STRENGTH"), 0, 100, 1, 0))),
     sensibn(Gtk::manage(new Adjuster(M("TP_LOCALLAB_SENSIBN"), 0, 100, 1, 40))),
     // Tone Mapping
@@ -1579,7 +1579,7 @@ void Locallab::write(ProcParams* pp, ParamsEdited* pedited)
                     pp->locallab.spots.at(pp->locallab.selspot).sensisf = sensisf->getIntValue();
                     // Blur & Noise
                     pp->locallab.spots.at(pp->locallab.selspot).expblur = expblur->getEnabled();
-                    pp->locallab.spots.at(pp->locallab.selspot).radius = radius->getIntValue();
+                    pp->locallab.spots.at(pp->locallab.selspot).radius = radius->getValue();
                     pp->locallab.spots.at(pp->locallab.selspot).strength = strength->getIntValue();
                     pp->locallab.spots.at(pp->locallab.selspot).sensibn = sensibn->getIntValue();
 
@@ -2642,7 +2642,7 @@ void Locallab::setDefaults(const ProcParams * defParams, const ParamsEdited * pe
     streng->setDefault((double)defSpot->streng);
     sensisf->setDefault((double)defSpot->sensisf);
     // Blur & Noise
-    radius->setDefault((double)defSpot->radius);
+    radius->setDefault(defSpot->radius);
     strength->setDefault((double)defSpot->strength);
     sensibn->setDefault((double)defSpot->sensibn);
     // Tone Mapping