diff --git a/examples/contiki/coap-observer.c b/examples/contiki/coap-observer.c
index 8c8f12c3..be5989ae 100644
--- a/examples/contiki/coap-observer.c
+++ b/examples/contiki/coap-observer.c
@@ -35,7 +35,6 @@
 
 #include <string.h>
 
-#include "debug.h"
 #include "coap.h"
 
 static coap_context_t *coap_context;