diff --git a/oaipmh-core/src/main/java/info/textgrid/middleware/IdentifierListDelivererDC.java b/oaipmh-core/src/main/java/info/textgrid/middleware/IdentifierListDelivererDC.java
index ebdf264ef9d3a90db3b4ebd77a5ec6ebe8cc8774..cb165e8bc8aea7c870284d454a4cca15f6d6b95d 100644
--- a/oaipmh-core/src/main/java/info/textgrid/middleware/IdentifierListDelivererDC.java
+++ b/oaipmh-core/src/main/java/info/textgrid/middleware/IdentifierListDelivererDC.java
@@ -37,6 +37,7 @@ import info.textgrid.middleware.common.TextGridMimetypes;
 public class IdentifierListDelivererDC extends IdentifierListDelivererAbstract {
 
   private static final int lifeTimeResToken = 100;
+  private static final String DH_ES_DIVIDER_CHAR = ".";
   private static final String DH_ES_DIVIDER_REGEXP = "\\.";
 
   private static org.apache.commons.logging.Log log =
@@ -191,12 +192,12 @@ public class IdentifierListDelivererDC extends IdentifierListDelivererAbstract {
         System.out.println("  ##  dateOfObjectCreation  -->  " + this.dateOfObjectCreation);
 
         // Get date field.
-        if (this.dateOfObjectCreation.contains(DH_ES_DIVIDER_REGEXP)) {
+        if (this.dateOfObjectCreation.contains(DH_ES_DIVIDER_CHAR)) {
           // Divide date object.
           String dateOfObjectCreationEntries[] =
               this.dateOfObjectCreation.split(DH_ES_DIVIDER_REGEXP);
 
-          System.out.println("  ##  divider  -->  " + DH_ES_DIVIDER_REGEXP);
+          System.out.println("  ##  divider  -->  " + DH_ES_DIVIDER_CHAR);
           System.out.println("  ##  length of dOOCD  -->  " + dateOfObjectCreationEntries.length);
           System.out.println("  ##  dOOCD  -->  " + dateOfObjectCreationEntries);