diff --git a/deep_sequencing_unit/source/java/ch/ethz/bsse/cisd/dsu/tracking/email/EntityTrackingEmailGenerator.java b/deep_sequencing_unit/source/java/ch/ethz/bsse/cisd/dsu/tracking/email/EntityTrackingEmailGenerator.java
index f3c6d2e877a78cfffd613bcd62f21e140ad82a66..abbdbff8c5044536e59d06cedb6e54ed284809ad 100644
--- a/deep_sequencing_unit/source/java/ch/ethz/bsse/cisd/dsu/tracking/email/EntityTrackingEmailGenerator.java
+++ b/deep_sequencing_unit/source/java/ch/ethz/bsse/cisd/dsu/tracking/email/EntityTrackingEmailGenerator.java
@@ -230,7 +230,7 @@ public class EntityTrackingEmailGenerator implements IEntityTrackingEmailGenerat
                         "You can download results for external sample named '%s' at",
                         externalSampleName), dataSet.getPermlink());
                 // add which Data set type has been added
-                appendAttribute(sb, "Data Set Type:", dataSet.getDataSetType().toString());
+                appendAttribute(sb, "Data Set Type", dataSet.getDataSetType().toString());
 
                 // data set properties
                 appendProperties(sb, dataSet.getProperties());