diff --git a/ChangeLog b/ChangeLog
index 7680e4a40..f69d65378 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Mar  1 17:12:00 1999  Richard Frith-Macdonald <richard@brainstorm.co.uk>
+
+	* Headers/AppKit/NSCell.h: Added MacOS-X cell state constants.
+
 Thu Feb 25 15:00:00 1999  Richard Frith-Macdonald <richard@brainstorm.co.uk>
 
 	Added support for the new (MacOS-X) NSGraphicsContext class by
diff --git a/Headers/gnustep/gui/NSCell.h b/Headers/gnustep/gui/NSCell.h
index 3b1afc386..59115ba49 100644
--- a/Headers/gnustep/gui/NSCell.h
+++ b/Headers/gnustep/gui/NSCell.h
@@ -86,10 +86,10 @@ typedef enum _NSCellAttribute {
 } NSCellAttribute;
 
 enum {
-  NSNoCellMask					= 0,
-  NSContentsCellMask			= 1,
-  NSPushInCellMask				= 2,
-  NSChangeGrayCellMask			= 4,
+  NSNoCellMask			= 0,
+  NSContentsCellMask		= 1,
+  NSPushInCellMask		= 2,
+  NSChangeGrayCellMask		= 4,
   NSChangeBackgroundCellMask	= 8
 };
 
@@ -98,6 +98,14 @@ enum {
   yDist = 2		// vertical distance between the text and image rects. 
 };
 
+#ifndef	STRICT_OPENSTEP
+enum {
+  NSOffState			= 0,
+  NSOnState			= 1,
+  NSMixedState			= 2
+};
+#endif
+
 @interface NSCell : NSObject <NSCopying, NSCoding>
 {
   // Attributes