--- ProjectDocument.m.orig	2007-06-17 12:28:19.000000000 -0400
+++ ProjectDocument.m	2007-06-17 12:24:14.000000000 -0400
@@ -28,6 +28,7 @@
 #import <Foundation/NSDictionary.h>
 #import <Foundation/NSUserDefaults.h>
 #import <Foundation/NSProcessInfo.h>
+#import <Foundation/NSError.h>
 
 #import <AppKit/NSWorkspace.h>
 #import <AppKit/NSDocumentController.h>
