diff --git a/examples/nfc-mfultralight.c b/examples/nfc-mfultralight.c
index 733fcbe..d0480e6 100644
--- a/examples/nfc-mfultralight.c
+++ b/examples/nfc-mfultralight.c
@@ -48,6 +48,7 @@
 
 #include <nfc/nfc.h>
 
+#include "nfc-utils.h"
 #include "mifare.h"
 
 static nfc_device_t *pnd;
diff --git a/examples/nfc-utils.h b/examples/nfc-utils.h
index f0f0678..018193c 100644
--- a/examples/nfc-utils.h
+++ b/examples/nfc-utils.h
@@ -38,6 +38,7 @@
 
 #  include <stdlib.h>
 #  include <string.h>
+#  include <err.h>
 
 /**
  * @macro DBG