diff --git a/examples/cc2530dk/sniffer/Makefile b/examples/cc2530dk/sniffer/Makefile
index d9491a92c..2fcdf669d 100644
--- a/examples/cc2530dk/sniffer/Makefile
+++ b/examples/cc2530dk/sniffer/Makefile
@@ -1,4 +1,5 @@
 DEFINES+=PROJECT_CONF_H
+DEFINES+=MODEL_CC2531=1
 PROJECT_SOURCEFILES += stub-rdc.c
 
 CONTIKI_PROJECT = sniffer
diff --git a/examples/cc2530dk/sniffer/project-conf.h b/examples/cc2530dk/sniffer/project-conf.h
index 564f4d760..a08744337 100644
--- a/examples/cc2530dk/sniffer/project-conf.h
+++ b/examples/cc2530dk/sniffer/project-conf.h
@@ -47,4 +47,7 @@
 #define LPM_CONF_MODE          0
 #define UART0_CONF_HIGH_SPEED  1
 
+/* Used by cc2531 USB dongle builds, has no effect on SmartRF builds */
+#define USB_SERIAL_CONF_BUFFERED 1
+
 #endif /* PROJECT_CONF_H_ */