diff --git a/uk/ac/sanger/artemis/chado/DbSqlConfig.java b/uk/ac/sanger/artemis/chado/DbSqlConfig.java
index b4c92b0705aa2f1e158685e2d94367236e1bf93a..5190f5fcffca6dfe5f18138def598eee27e298d1 100644
--- a/uk/ac/sanger/artemis/chado/DbSqlConfig.java
+++ b/uk/ac/sanger/artemis/chado/DbSqlConfig.java
@@ -51,6 +51,9 @@ public class DbSqlConfig
    * artemis_sqlmap/chado_iBatis_config.xml file and the
    * database location properties defined by the system property, 
    * <i>e.g.</i> -Dchado=localhost:2997/chado?tjc
+   * 
+   * It is especially important that the -Dchado argument is not prefixed with
+   * jdbc:postgresql:// as that is handled in iBatis
    *
    */
   public void init(JPasswordField fpasswd)