diff --git a/rtgui/adjuster.cc b/rtgui/adjuster.cc
index ba7dab662..d15bd4011 100644
--- a/rtgui/adjuster.cc
+++ b/rtgui/adjuster.cc
@@ -214,6 +214,12 @@ void Adjuster::setLimits (double vmin, double vmax, double vstep, double vdefaul
   slider->set_range (vmin, vmax);
   slider->set_value (shapeValue(vdefault));
   //defaultVal = shapeValue (vdefault);
+
+  double maxAbs = fmax(fabs(vmin), fabs(vmax));
+  int digits2;
+  for (digits2=0; maxAbs/pow(double(10),digits2)>=1.0; digits2++);
+  spin->set_width_chars(digits+digits2+(vmin<0?1:0)+(digits>0?1:0));
+
   sliderChange.block (false);
   spinChange.block (false);
 }
diff --git a/rtgui/guiutils.cc b/rtgui/guiutils.cc
index dcbd476a7..85812ba64 100644
--- a/rtgui/guiutils.cc
+++ b/rtgui/guiutils.cc
@@ -306,7 +306,6 @@ bool MyComboBox::on_scroll_event (GdkEventScroll* event) {
 }
 
 MySpinButton::MySpinButton () {
-	set_size_request(50, -1);
 	Gtk::Border border;
 	border.bottom = 0;
 	border.top = 0;