diff --git a/contiki-cpc/conf/clock-conf.h b/contiki-cpc/conf/clock-conf.h
new file mode 100644
index 0000000..a690e15
--- /dev/null
+++ b/contiki-cpc/conf/clock-conf.h
@@ -0,0 +1,8 @@
+#ifndef __CLOCK_CONF_H__
+#define __CLOCK_CONF_H__
+
+typedef unsigned short clock_time_t;
+
+#define CLOCK_CONF_SECOND CLK_TCK
+
+#endif /* __CLOCK_CONF_H__ */