diff --git a/ChangeLog b/ChangeLog
index 1353a29b4..47797c4c8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2010-01-11 Quentin Mathe <quentin.mathe@gmail.com>
+
+	* Source/NSFormatter.m (-copyWithZone:, -initWithCoder:, 
+	-encodeWithCoder:): Removed the subclass responsability, in order to 
+	have subclasses automatically coding and copying compliant as Cocoa does.
+	You can also now safely call [super copyWithZone:/initWithCoder:] in a 
+	subclass.
+
 2010-01-11 Richard Frith-Macdonald <rfm@gnu.org>
 
 	* Source/NSMapTable.m:
diff --git a/Source/NSFormatter.m b/Source/NSFormatter.m
index 2e2b5040e..7a95e46d7 100644
--- a/Source/NSFormatter.m
+++ b/Source/NSFormatter.m
@@ -38,8 +38,7 @@
 
 - (id) copyWithZone: (NSZone*)zone
 {
-  [self subclassResponsibility: _cmd];
-  return nil;
+  return [[self class] allocWithZone: zone];
 }
 
 - (NSString*) editingStringForObjectValue: (id)anObject
@@ -49,7 +48,7 @@
 
 - (void) encodeWithCoder: (NSCoder*)aCoder
 {
-  [self subclassResponsibility: _cmd];
+
 }
 
 - (BOOL) getObjectValue: (id*)anObject
@@ -62,8 +61,7 @@
 
 - (id) initWithCoder: (NSCoder*)aCoder
 {
-  [self subclassResponsibility: _cmd];
-  return nil;
+  return [super init];
 }
 
 - (BOOL) isPartialStringValid: (NSString*)partialString