diff --git a/ChangeLog b/ChangeLog
index 8626fb3aa..286e00a6b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2010-12-30  Wolfgang Sourdeau  <wsourdeau@inverse.ca>
+
+	* OpenChange/EOBitmaskQualifier.m (-description): new method.
+
 2010-12-29  Ludovic Marcotte  <lmarcotte@inverse.ca>
 
 	* Moved the string encryption code from SoObjects/SOGo/SQLSource.m
diff --git a/OpenChange/EOBitmaskQualifier.m b/OpenChange/EOBitmaskQualifier.m
index b0b58219c..c2bbf56ae 100644
--- a/OpenChange/EOBitmaskQualifier.m
+++ b/OpenChange/EOBitmaskQualifier.m
@@ -20,6 +20,8 @@
  * Boston, MA 02111-1307, USA.
  */
 
+#import <Foundation/NSString.h>
+
 #import "EOBitmaskQualifier.h"
 
 @implementation EOBitmaskQualifier
@@ -59,4 +61,17 @@
   return isZero;
 }
 
+- (NSString *) description
+{
+  NSMutableString *desc;
+
+  desc = [NSMutableString stringWithCapacity: [key length] + 24];
+
+  if (isZero)
+    [desc appendString: @"!"];
+  [desc appendFormat: @"(%@ & 0x%.8x)", key, mask];
+
+  return desc;
+}
+
 @end