diff --git a/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/server/library_tools/ImageAnalysisLMCSplitter.java b/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/server/library_tools/ImageAnalysisLMCSplitter.java
index d16482821724b4f568ffe95acf98beecadb84f46..4aade045e5f28bc42699020af2fb52d6797e2cb4 100644
--- a/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/server/library_tools/ImageAnalysisLMCSplitter.java
+++ b/screening/source/java/ch/systemsx/cisd/openbis/plugin/screening/client/web/server/library_tools/ImageAnalysisLMCSplitter.java
@@ -35,6 +35,8 @@ import com.csvreader.CsvReader;
  */
 public class ImageAnalysisLMCSplitter
 {
+    private static final String SEPARATOR = ",";
+
     public static void main(String[] args) throws FileNotFoundException, IOException
     {
         if (args.length != 1)
@@ -91,6 +93,6 @@ public class ImageAnalysisLMCSplitter
         {
             tokens[i] = tokens[i].replace(';', ',');
         }
-        return StringUtils.join(tokens, ";");
+        return StringUtils.join(tokens, SEPARATOR);
     }
 }