diff --git a/UI/Common/UIxToolbar.m b/UI/Common/UIxToolbar.m
index 782124924..6b68661d1 100644
--- a/UI/Common/UIxToolbar.m
+++ b/UI/Common/UIxToolbar.m
@@ -19,6 +19,7 @@
   02111-1307, USA.
 */
 
+#import <Foundation/NSKeyValueCoding.h>
 #import <NGExtensions/NGExtensions.h>
 #import <NGObjWeb/NGObjWeb.h>
 #import <NGObjWeb/SoObjects.h>