diff --git a/openbis_api/source/java/ch/ethz/sis/openbis/generic/asapi/v3/dto/common/search/DateEqualToValue.java b/openbis_api/source/java/ch/ethz/sis/openbis/generic/asapi/v3/dto/common/search/DateEqualToValue.java
index ff09f580107c7b5b380a3c65f0319b4df4598ab5..9b8ef44b6c4fadb71123e65bf6e686629c451a63 100644
--- a/openbis_api/source/java/ch/ethz/sis/openbis/generic/asapi/v3/dto/common/search/DateEqualToValue.java
+++ b/openbis_api/source/java/ch/ethz/sis/openbis/generic/asapi/v3/dto/common/search/DateEqualToValue.java
@@ -27,6 +27,11 @@ public class DateEqualToValue extends AbstractDateValue
 
     private static final long serialVersionUID = 1L;
 
+    DateEqualToValue()
+    {
+    	super(null);
+    }
+    
     DateEqualToValue(String value)
     {
         super(value);