diff --git a/platform/z1/contiki-conf.h b/platform/z1/contiki-conf.h
index 89832b475..729eef723 100644
--- a/platform/z1/contiki-conf.h
+++ b/platform/z1/contiki-conf.h
@@ -192,7 +192,7 @@
 
 
 #ifdef PROJECT_CONF_H
-#include PROJECT_CONF_H
+#include "project-conf.h"
 #endif /* PROJECT_CONF_H */