diff --git a/src/main/java/org/citygml4j/tools/command/FilterLodsCommand.java b/src/main/java/org/citygml4j/tools/command/FilterLodsCommand.java
index 729208a..7928635 100644
--- a/src/main/java/org/citygml4j/tools/command/FilterLodsCommand.java
+++ b/src/main/java/org/citygml4j/tools/command/FilterLodsCommand.java
@@ -73,7 +73,7 @@ public class FilterLodsCommand extends CityGMLTool {
     private CityGMLOutputOptions outputOptions;
 
     @CommandLine.Mixin
-    OverwriteInputOption overwriteOption;
+    private OverwriteInputOption overwriteOption;
 
     @CommandLine.Mixin
     private InputOptions inputOptions;