diff --git a/src/main/java/org/jabref/logic/sharelatex/WebSocketClientWrapper.java b/src/main/java/org/jabref/logic/sharelatex/WebSocketClientWrapper.java
index e36a0c8f6b2..cb55e3a6443 100644
--- a/src/main/java/org/jabref/logic/sharelatex/WebSocketClientWrapper.java
+++ b/src/main/java/org/jabref/logic/sharelatex/WebSocketClientWrapper.java
@@ -215,7 +215,7 @@ private void parseContents(String message) {
                 joinDoc(docId);
             }
 
-            if (message.startsWith("[null,{", ShareLatexParser.JSON_START_OFFSET)) {
+            if (message.startsWith("[null,{", message.indexOf("+") + 1)) {
                 System.out.println("We get a list with all files");
                 //We get a list with all files
                 Map<String, String> dbWithID = parser.getBibTexDatabasesNameWithId(message);