diff --git a/src/fr/devinsy/statoolinfos/htmlize/charts/ChabuUtils.java b/src/fr/devinsy/statoolinfos/htmlize/charts/ChabuUtils.java
index fde78fb..82b9644 100644
--- a/src/fr/devinsy/statoolinfos/htmlize/charts/ChabuUtils.java
+++ b/src/fr/devinsy/statoolinfos/htmlize/charts/ChabuUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020 Christian Pierre MOMON <christian@momon.org>
+ * Copyright (C) 2020-2021 Christian Pierre MOMON <christian@momon.org>
  * 
  * This file is part of StatoolInfos, simple service statistics tool.
  * 
@@ -613,7 +613,10 @@ public class ChabuUtils
             target.append("'");
             target.append(",");
         }
-        target.removeLast();
+        if (!source.isEmpty())
+        {
+            target.removeLast();
+        }
         target.append("]");
 
         result = target.toString();