diff --git a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileHeaderVerifier.java b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileHeaderVerifier.java
index 89be8c69fea7f9032f8da55f3d8b5e7ac4d0f58d..5e80b08c3d5679de1381201f57131e02f7d6e9c6 100644
--- a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileHeaderVerifier.java
+++ b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileHeaderVerifier.java
@@ -16,6 +16,8 @@
 
 package ch.systemsx.cisd.openbis.dss.archiveverifier.verifier;
 
+import static ch.systemsx.cisd.common.io.IOUtilities.crc32ToString;
+
 import java.util.ArrayList;
 import java.util.Enumeration;
 import java.util.List;
@@ -92,11 +94,13 @@ public class ZipFileHeaderVerifier extends AbstractZipFileVerifier
 
                 } else if (externalCrc != entry.getCrc())
                 {
-                    errors.add(entryName + ": CRC32 in archive file: " + entry.getCrc() + ", CRC32 in " + repositoryName + ": " + externalCrc);
+                    errors.add(entryName + ": CRC32 in archive file: " + crc32ToString((int) entry.getCrc()) + ", CRC32 in " + repositoryName + ": "
+                            + crc32ToString((int) externalCrc.longValue()));
                 }
             } else if (externalCrc != null)
             {
-                errors.add(entryName + ": CRC32 found in " + repositoryName + " even it should be disabled. Value was " + externalCrc);
+                errors.add(entryName + ": CRC32 found in " + repositoryName + " even it should be disabled. Value was "
+                        + crc32ToString((int) externalCrc.longValue()));
             }
         }
         return errors;
diff --git a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileIntegrityVerifier.java b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileIntegrityVerifier.java
index 0a6e5f46acd2f238ae060f9dcb49a57f235eb996..66f94f1644d70bab54d477e17467c2d690da92d1 100644
--- a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileIntegrityVerifier.java
+++ b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileIntegrityVerifier.java
@@ -16,6 +16,8 @@
 
 package ch.systemsx.cisd.openbis.dss.archiveverifier.verifier;
 
+import static ch.systemsx.cisd.common.io.IOUtilities.crc32ToString;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
@@ -59,8 +61,8 @@ public class ZipFileIntegrityVerifier extends AbstractZipFileVerifier
             long crc = calculateCRC32(input);
             if (crc != entry.getCrc())
             {
-                return Arrays.asList(entry.getName() + ": CRC failure (got " + Long.toHexString(crc) + ", should be "
-                        + Long.toHexString(entry.getCrc()) + ")");
+                return Arrays.asList(entry.getName() + ": CRC failure (got " + crc32ToString((int) crc) + ", should be "
+                        + crc32ToString((int) entry.getCrc()) + ")");
             }
 
         } catch (ZipException ex)
diff --git a/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileIntegrityVerifierTest.java b/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileIntegrityVerifierTest.java
index 5ab5b6b839c888f4d1f0d565ac4c4b1d10b375a4..8b648190ad33cfb0fa49906fd80ae7980fbed3c4 100644
--- a/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileIntegrityVerifierTest.java
+++ b/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/archiveverifier/verifier/ZipFileIntegrityVerifierTest.java
@@ -54,7 +54,6 @@ public class ZipFileIntegrityVerifierTest
     public void verificationOfValidZipFileSucceeds() throws Exception
     {
         List<String> errors = verifier.verify(VALID_ZIP_FILE);
-        System.out.println(errors);
         assertThat(errors.isEmpty(), is(true));
     }