diff --git a/app/cli-acx/src/main/java/io/github/applecommander/acx/command/ImportCommand.java b/app/cli-acx/src/main/java/io/github/applecommander/acx/command/ImportCommand.java
index 75efa07..9c432fe 100644
--- a/app/cli-acx/src/main/java/io/github/applecommander/acx/command/ImportCommand.java
+++ b/app/cli-acx/src/main/java/io/github/applecommander/acx/command/ImportCommand.java
@@ -72,7 +72,7 @@ public class ImportCommand extends ReadWriteDiskCommandOptions {
     @ArgGroup(heading = "%nInput source:%n", multiplicity = "1")
     private InputData inputData;
 
-    @ArgGroup(heading = "%nProcessing options:%n")
+    @ArgGroup(heading = "%nProcessing options:%n", multiplicity = "1")
     private Processor processor;
     
     @ArgGroup(heading = "%nGeneral overrides:%n", exclusive = false)