diff --git a/drivers/staging/vt6655/iocmd.h b/drivers/staging/vt6655/iocmd.h
index 53c50c0fc813782558a20ede4542256c5c6a03af..166351bb71a6bb857a974136f5d5547ef604d544 100644
--- a/drivers/staging/vt6655/iocmd.h
+++ b/drivers/staging/vt6655/iocmd.h
@@ -33,10 +33,6 @@
 
 /*---------------------  Export Definitions -------------------------*/
 
-#if !defined(DEF)
-#define DEF
-#endif
-
 //typedef uint32_t u32;
 //typedef uint16_t u16;
 //typedef uint8_t u8;
diff --git a/drivers/staging/vt6656/iocmd.h b/drivers/staging/vt6656/iocmd.h
index 1ce39a4ba2f4861ea36c9e38b2d67fdbed13771b..22710cef751d77fe51dc9d760fc98574c6c94b44 100644
--- a/drivers/staging/vt6656/iocmd.h
+++ b/drivers/staging/vt6656/iocmd.h
@@ -33,10 +33,6 @@
 
 /*---------------------  Export Definitions -------------------------*/
 
-#if !defined(DEF)
-#define DEF
-#endif
-
 // ioctl Command code
 #define MAGIC_CODE	                 0x3142
 #define IOCTL_CMD_TEST	            (SIOCDEVPRIVATE + 0)