diff --git a/ChangeLog b/ChangeLog
index 5ed1ae5d7..9d93a22cc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2025-04-30 Gregory John Casamento <greg.casamento@gmail.com>
+
+	* Headers/AppKit/NSColorSpace.h: Add NSColorSpaceModel* enumerated values.
+
 2025-02-11 Richard Frith-Macdonald <rfm@gnu.org>
 
 	* ANNOUNCE:
diff --git a/Headers/AppKit/NSColorSpace.h b/Headers/AppKit/NSColorSpace.h
index e3fd7ad60..29eabebf5 100644
--- a/Headers/AppKit/NSColorSpace.h
+++ b/Headers/AppKit/NSColorSpace.h
@@ -44,7 +44,13 @@ typedef enum _NSColorSpaceModel
   NSRGBColorSpaceModel,
   NSCMYKColorSpaceModel,
   NSLABColorSpaceModel,
-  NSDeviceNColorSpaceModel
+  NSDeviceNColorSpaceModel,
+  NSColorSpaceModelUnknown = NSUnknownColorSpaceModel,
+  NSColorSpaceModelGray = NSGrayColorSpaceModel,
+  NSColorSpaceModelRGB = NSRGBColorSpaceModel,
+  NSColorSpaceModelCMYK = NSCMYKColorSpaceModel,
+  NSColorSpaceModelLAB = NSLABColorSpaceModel,
+  NSColorSpaceModelDeviceN = NSDeviceNColorSpaceModel
 } NSColorSpaceModel;
 
 APPKIT_EXPORT_CLASS