diff --git a/services/oboeservice/AAudioServiceStreamBase.h b/services/oboeservice/AAudioServiceStreamBase.h
index e91ea82..2f94614 100644
--- a/services/oboeservice/AAudioServiceStreamBase.h
+++ b/services/oboeservice/AAudioServiceStreamBase.h
@@ -54,7 +54,10 @@
         ILLEGAL_THREAD_ID = 0
     };
 
-    std::string dump() const;
+    static std::string dumpHeader();
+
+    // does not include EOL
+    virtual std::string dump() const;
 
     // -------------------------------------------------------------------
     /**