diff --git a/drivers/s390/char/vmur.h b/drivers/s390/char/vmur.h
index 522a9df..2b3c564 100644
--- a/drivers/s390/char/vmur.h
+++ b/drivers/s390/char/vmur.h
@@ -53,6 +53,7 @@
 #define FLG_SYSTEM_HOLD	0x04
 #define FLG_CP_DUMP	0x10
 #define FLG_USER_HOLD	0x20
+#define FLG_IN_USE	0x80
 
 /*
  * A struct urdev is created for each ur device that is made available