diff --git a/include/sys/file.h b/include/sys/file.h
index 63d662237d..f5ee2f0dff 100644
--- a/include/sys/file.h
+++ b/include/sys/file.h
@@ -1,4 +1,6 @@
 #ifndef _SPL_FILE_H
 #define _SPL_FILE_H
 
+#define FKIOCTL		0x80000000
+
 #endif /* SPL_FILE_H */