diff --git a/kmpp/base/kmpp_ioc.c b/kmpp/base/kmpp_ioc.c
index a3aefce1..dedce54d 100644
--- a/kmpp/base/kmpp_ioc.c
+++ b/kmpp/base/kmpp_ioc.c
@@ -5,34 +5,8 @@
 
 #include "kmpp_ioc.h"
 
-typedef struct KmppIocImpl_t {
-    /* object defintion index for ioctl functions */
-    rk_u32              def;
-    /* object defintion ioctl command */
-    rk_u32              cmd;
-    /*
-     * flags for:
-     * last in the batch / not last
-     * block / non-block
-     * return / non-return
-     * sync / async
-     * ack / non-ack
-     * direct call / timer call
-     */
-    rk_u32              flags;
-    /* ioc object id for input and output queue match */
-    rk_u32              id;
-    /* ioc context object */
-    KmppShmPtr          ctx;
-    /* input config object */
-    KmppShmPtr          in;
-    /* output return object */
-    KmppShmPtr          out;
-} KmppIocImpl;
-
 #define KMPP_OBJ_NAME               kmpp_ioc
 #define KMPP_OBJ_INTF_TYPE          KmppIoc
-#define KMPP_OBJ_IMPL_TYPE          KmppIocImpl
 #define KMPP_OBJ_SGLN_ID            MPP_SGLN_KMPP_IOC
 #define KMPP_OBJ_ENTRY_TABLE        KMPP_IOC_ENTRY_TABLE
 #define KMPP_OBJ_MISMATCH_LOG_DISABLE