diff --git a/src/fsfw/action/CommandActionHelper.h b/src/fsfw/action/CommandActionHelper.h
index dd8ad7f1..f0eac6d9 100644
--- a/src/fsfw/action/CommandActionHelper.h
+++ b/src/fsfw/action/CommandActionHelper.h
@@ -16,9 +16,10 @@ class CommandActionHelper {
  public:
   CommandActionHelper(CommandsActionsIF* owner);
   virtual ~CommandActionHelper();
-  ReturnValue_t commandAction(object_id_t commandTo, ActionId_t actionId, const uint8_t* data,
-                              uint32_t size);
-  ReturnValue_t commandAction(object_id_t commandTo, ActionId_t actionId, SerializeIF* data);
+  ReturnValue_t commandAction(object_id_t commandTo, ActionId_t actionId,
+                              const uint8_t* data = nullptr, uint32_t size = 0);
+  ReturnValue_t commandAction(object_id_t commandTo, ActionId_t actionId,
+                              SerializeIF* data);
   ReturnValue_t initialize();
   ReturnValue_t handleReply(CommandMessage* reply);
   uint8_t getCommandCount() const;