diff --git a/extensions/wikidata/src/org/openrefine/wikidata/operations/PerformWikibaseEditsOperation.java b/extensions/wikidata/src/org/openrefine/wikidata/operations/PerformWikibaseEditsOperation.java
index aabed7afe..d45c08709 100644
--- a/extensions/wikidata/src/org/openrefine/wikidata/operations/PerformWikibaseEditsOperation.java
+++ b/extensions/wikidata/src/org/openrefine/wikidata/operations/PerformWikibaseEditsOperation.java
@@ -194,7 +194,7 @@ public class PerformWikibaseEditsOperation extends EngineDependentOperation {
             // Generate batch token
             long token = (new Random()).nextLong();
             String summary = _summary + String.format(" ([[:toollabs:editgroups/b/OR/%s|details]])",
-                    (Long.toHexString(token).substring(0, 7)));
+                    (Long.toHexString(token).substring(0, 8)));
 
             // Evaluate the schema
             List<ItemUpdate> itemDocuments = _schema.evaluate(_project, _engine);