diff --git a/rdb/src/main/java/com/instana/dc/rdb/impl/informix/InformixDc.java b/rdb/src/main/java/com/instana/dc/rdb/impl/informix/InformixDc.java
index 1d4bf97..176d763 100644
--- a/rdb/src/main/java/com/instana/dc/rdb/impl/informix/InformixDc.java
+++ b/rdb/src/main/java/com/instana/dc/rdb/impl/informix/InformixDc.java
@@ -66,7 +66,7 @@ public class InformixDc extends AbstractDbDc {
 
     private final MetricsCollector metricCollector;
 
-    public Boolean sqlTraceEnabled;
+    private Boolean sqlTraceEnabled;
 
     public InformixDc(Map<String, Object> properties, String dbSystem, String dbDriver) throws SQLException {
         super(properties, dbSystem, dbDriver);