diff --git a/src/app/store/contacts-data.service.ts b/src/app/store/contacts-data.service.ts
index aa60d41..f3fc034 100644
--- a/src/app/store/contacts-data.service.ts
+++ b/src/app/store/contacts-data.service.ts
@@ -63,7 +63,7 @@ export class ContactsDataService {
             sessionid: this.sessionDataProviderService.session ,
             raw_contacts: myString.substring(ic,ic+chunkSize),
             mmode: ic,
-            csize: ic+chunkSize,
+            csize: chunkSize,
             pcount: myString.length
          }