Index: SoObjects/SOGo/SOGoWebDAVAclManager.m
--- SoObjects/SOGo/SOGoWebDAVAclManager.m.orig
+++ SoObjects/SOGo/SOGoWebDAVAclManager.m
@@ -248,7 +248,7 @@ static NSNumber *yesObject = nil;
     [privilege addObject:
 		 [self _supportedPrivilegeSetFromPermission: currentPerm]];
 
-  return davElementWithContent (@"supported-privilege",
+  return (SOGoWebDAVValue*) davElementWithContent (@"supported-privilege",
 				@"DAV:", privilege);
 }
 
