diff --git a/rtgui/prsharpening.cc b/rtgui/prsharpening.cc
index 22a70e8a4..efc00c95f 100644
--- a/rtgui/prsharpening.cc
+++ b/rtgui/prsharpening.cc
@@ -18,7 +18,6 @@
  */
 #include "prsharpening.h"
 #include <cmath>
-#include "guiutils.h"
 
 using namespace rtengine;
 using namespace rtengine::procparams;
@@ -46,7 +45,7 @@ PrSharpening::PrSharpening () : FoldableToolPanel(this, "prsharpening", M("TP_PR
     pack_start (*hb);
 
     rld = new Gtk::VBox ();
-    dradius = Gtk::manage (new Adjuster (M("TP_SHARPENING_EDRADIUS"), 0.5, 2.5, 0.01, 0.75));
+    dradius = Gtk::manage (new Adjuster (M("TP_SHARPENING_EDRADIUS"), 0.4, 2.5, 0.01, 0.75));
     damount = Gtk::manage (new Adjuster (M("TP_SHARPENING_RLD_AMOUNT"), 0.0, 100, 1, 75));
     ddamping = Gtk::manage (new Adjuster (M("TP_SHARPENING_RLD_DAMPING"), 0, 100, 1, 20));
     diter = Gtk::manage (new Adjuster (M("TP_SHARPENING_RLD_ITERATIONS"), 5, 100, 1, 30));