diff --git a/sys/sys/dkstat.h b/sys/sys/dkstat.h
index ef19e2b9ecec..de66e17e3d84 100644
--- a/sys/sys/dkstat.h
+++ b/sys/sys/dkstat.h
@@ -42,4 +42,6 @@
 #ifndef _SYS_DKSTAT_H_
 #define _SYS_DKSTAT_H_ 1
 
+#warning "<sys/dkstat.h> is deprecated and should not be #include'd"
+
 #endif /* _SYS_DKSTAT_H_ */