diff --git a/examples/osd/arduino-merkurboard/project-conf.h b/examples/osd/arduino-merkurboard/project-conf.h
index e0b72b6dc..2d5781ca4 100644
--- a/examples/osd/arduino-merkurboard/project-conf.h
+++ b/examples/osd/arduino-merkurboard/project-conf.h
@@ -44,10 +44,12 @@
 /* For projects, optimize memory and enable RDC again. */
 //#undef NETSTACK_CONF_RDC
 //#define NETSTACK_CONF_RDC     nullrdc_driver
+//#undef NETSTACK_CONF_MAC
+//#define  NETSTACK_CONF_MAC	nullmac_driver
 
 /* Increase rpl-border-router IP-buffer when using more than 64. */
-#undef REST_MAX_CHUNK_SIZE
-#define REST_MAX_CHUNK_SIZE    64
+//#undef REST_MAX_CHUNK_SIZE
+//#define REST_MAX_CHUNK_SIZE    64
 
 /* Estimate your header size, especially when using Proxy-Uri. */
 /*
@@ -78,9 +80,4 @@
 */
 
 
-
-
-
-
-
 #endif /* PROJECT_RPL_WEB_CONF_H_ */