diff --git a/ChangeLog b/ChangeLog
index 426650b87..3094fa6f4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,8 @@
 	* Source/NSMenuItemCell.m
 	* Headers/AppKit/NSMenuItemCell.h
 	  float -> CGFloat transitions
+	* ColorPickers/GSColorSliderCell.m
+	  more float -> CGFloat transitions
 
 2013-03-01  Richard Frith-Macdonald <rfm@gnu.org>
 
diff --git a/ColorPickers/GSColorSliderCell.m b/ColorPickers/GSColorSliderCell.m
index b3107bbce..3e99f5e16 100644
--- a/ColorPickers/GSColorSliderCell.m
+++ b/ColorPickers/GSColorSliderCell.m
@@ -186,7 +186,7 @@
   [self drawKnob];
 }
 
-- (float) knobThickness
+- (CGFloat) knobThickness
 {
   return KNOB_WIDTH;
 }