--- a/Resources/Configuration.json	Fri Dec 09 11:24:04 2016 +0100
+++ b/Resources/Configuration.json	Fri Dec 09 14:48:31 2016 +0100
@@ -314,9 +314,12 @@
      }
    **/
   
-  // If set to "true", Orthanc will handle "SOP Classes in Study"
-  // (0008,0062) in C-FIND requests. This option is turned off by
-  // default, as it requires intensive accesses to the hard drive.
+  // If set to "true", Orthanc will still handle "SOP Classes in
+  // Study" (0008,0062) in C-FIND requests, even if the "SOP Class
+  // UID" metadata is not available in the database (which is the case
+  // if the DB was previously used by Orthanc <= 1.1.0). This option
+  // is turned off by default, as it requires intensive accesses to
+  // the hard drive.
   "AllowFindSopClassesInStudy" : false,
 
   // If set to "false", Orthanc will not load its default dictionary