diff --git a/rtgui/labcurve.cc b/rtgui/labcurve.cc
index 32a03a2cf..ddcecf881 100644
--- a/rtgui/labcurve.cc
+++ b/rtgui/labcurve.cc
@@ -24,7 +24,7 @@ using namespace rtengine::procparams;
 
 LCurve::LCurve () : Gtk::VBox(), FoldableToolPanel(this) {
 
-	brightness = Gtk::manage (new Adjuster (M("TP_LABCURVE_BRIGHTNESS"), -100, 100, 0.01, 0));
+	brightness = Gtk::manage (new Adjuster (M("TP_LABCURVE_BRIGHTNESS"), -100, 100, 1, 0));
 	contrast   = Gtk::manage (new Adjuster (M("TP_LABCURVE_CONTRAST"), -100, 100, 1, 0));
 	saturation   = Gtk::manage (new Adjuster (M("TP_LABCURVE_SATURATION"), -100, 100, 1, 0));