diff --git a/platform/iris/contiki-conf.h b/platform/iris/contiki-conf.h
index 0e7fe2074..51fadd71c 100644
--- a/platform/iris/contiki-conf.h
+++ b/platform/iris/contiki-conf.h
@@ -198,4 +198,8 @@ void clock_wait(int ms10);
 void clock_set_seconds(unsigned long s);
 unsigned long clock_seconds(void);
 
+#ifdef PROJECT_CONF_H
+#include PROJECT_CONF_H
+#endif /* PROJECT_CONF_H */
+
 #endif /* __CONTIKI_CONF_H__ */