diff --git a/src/main/resources/META-INF/codex.properties b/src/main/resources/META-INF/codex.properties
index 304c51ef..3b3f3d28 100644
--- a/src/main/resources/META-INF/codex.properties
+++ b/src/main/resources/META-INF/codex.properties
@@ -2,6 +2,22 @@
 # classes within that need to be instrumented.
 #
 
+# ------ HSQLDB v2.3.1 ----------------------------------------------------------
+#
+org.hsqldb.jdbc.JDBCDataSource=hsqldb
+
+hsqldb.baseConnection=org.hsqldb.jdbc.JDBCConnection
+
+hsqldb.baseStatement=org.hsqldb.jdbc.JDBCStatement
+
+hsqldb.basePreparedStatement=org.hsqldb.jdbc.JDBCPreparedStatement
+
+hsqldb.subCallableStatement=org.hsqldb.jdbc.JDBCCallableStatement
+
+hsqldb.baseResultSet=org.hsqldb.jdbc.JDBCResultSet
+hsqldb.subResultSet=org.hsqldb.jdbc.JDBCResultSet$JDBCResultSetBasic
+
+
 # ------ Derby v10.10.1.1 -------------------------------------------------------
 #
 org.apache.derby.jdbc.ClientDataSource40=derby