diff --git a/ChangeLog b/ChangeLog
index 50d5912d3..2097d0e12 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2006-09-10  Richard Frith-Macdonald <rfm@gnu.org>
+
+	* Headers/Foundation/NSObject.h: Fix incorrect backward compatibility
+	setting for openstep version.
+
 2006-09-06  Richard Frith-Macdonald <rfm@gnu.org>
 
 	* Source/NSConnection.m: ([release]) protect with connection table
diff --git a/Headers/Foundation/NSObject.h b/Headers/Foundation/NSObject.h
index 2954db6a8..9967ccc29 100644
--- a/Headers/Foundation/NSObject.h
+++ b/Headers/Foundation/NSObject.h
@@ -32,10 +32,10 @@
  *	Check consistency of definitions for system compatibility.
  */
 #if	defined(STRICT_OPENSTEP)
-#define OS_API_VERSION	 10000
+#define GS_OPENSTEP_V	010000
 #define	NO_GNUSTEP	1
 #elif	defined(STRICT_MACOS_X)
-#define OS_API_VERSION	100000
+#define GS_OPENSTEP_V	100000
 #define	NO_GNUSTEP	1
 #else
 #undef	NO_GNUSTEP