Index: uspace/app/tmon/Makefile
===================================================================
--- uspace/app/tmon/Makefile	(revision 4ef3627f7c07d51bc2e311bb0094ada4ff98b8c2)
+++ uspace/app/tmon/Makefile	(revision bd05140d932d234ee044e634a47ef576a2dce904)
@@ -30,5 +30,5 @@
 BINARY = tmon
 
-LIBS =
+LIBS = usbdiag
 
 SOURCES = \
Index: uspace/app/tmon/main.c
===================================================================
--- uspace/app/tmon/main.c	(revision 4ef3627f7c07d51bc2e311bb0094ada4ff98b8c2)
+++ uspace/app/tmon/main.c	(revision bd05140d932d234ee044e634a47ef576a2dce904)
@@ -36,4 +36,5 @@
 
 #include <stdio.h>
+#include <usb/diag/diag.h>
 
 #define NAME "tmon"
@@ -51,4 +52,6 @@
 	}
 
+	printf("The number is %d.\n", usb_diag_test(0));
+
 	return 0;
 }