diff --git a/datastore_server/dist/etc/datastore_server.conf b/datastore_server/dist/etc/datastore_server.conf
index 33c4f1bac8c4ee1c7b864b553fe098f68ea2dfab..7b0ea75d8f7c1f1051d04ef4ee49b081dc7f1c38 100644
--- a/datastore_server/dist/etc/datastore_server.conf
+++ b/datastore_server/dist/etc/datastore_server.conf
@@ -10,9 +10,9 @@
 #
 # Options to the JRE
 #
-JAVA_OPTS=${JAVA_OPTS:=-server}
+JAVA_OPTS=${JAVA_OPTS:=-server -d64}
 
 #
 # Maximal number of log files to keep
 #
-MAXLOGS=5
\ No newline at end of file
+MAXLOGS=5