diff --git a/include/uapi/linux/cm4000_cs.h b/include/uapi/linux/cm4000_cs.h
index bc51f77db91897aec85574718e35db54ed4ebc0b..1217f751a1bc9a3f129f5e97aae8a911a5a59616 100644
--- a/include/uapi/linux/cm4000_cs.h
+++ b/include/uapi/linux/cm4000_cs.h
@@ -2,6 +2,7 @@
 #define _UAPI_CM4000_H_
 
 #include <linux/types.h>
+#include <linux/ioctl.h>
 
 #define	MAX_ATR			33