diff --git a/df_datalink/src/systembus/systembus.c b/df_datalink/src/systembus/systembus.c
index 2c208c7..0868e07 100644
--- a/df_datalink/src/systembus/systembus.c
+++ b/df_datalink/src/systembus/systembus.c
@@ -434,7 +434,7 @@ int32_t SystemBus_HandleCmd(SYSBUS *instPtr)
 		}
 		sysbusRsp = malloc(sizeof(SYSBUS_UART_FRAME));
 		sysbusRsp->len = FLJ_RM_TEST_RESP_LEN;
-		memset(sysbusRsp->data, FLJ_RM_TEST_RESP_LEN);
+		memset(sysbusRsp->data, 0x00, FLJ_RM_TEST_RESP_LEN);
 		sysbusRsp->data[WD_CMD] = CMD_FLJ_RM_TEST;
 		sysbusRsp->data[WD_PRD] = MY_PRD_ID;
 		
@@ -463,7 +463,7 @@ int32_t SystemBus_HandleCmd(SYSBUS *instPtr)
 		}
 		sysbusRsp = malloc(sizeof(SYSBUS_UART_FRAME));
 		sysbusRsp->len = LJ_RM_TEST_RESP_LEN;
-		memset(sysbusRsp->data, LJ_RM_TEST_RESP_LEN);
+		memset(sysbusRsp->data, 0x00, LJ_RM_TEST_RESP_LEN);
 		sysbusRsp->data[WD_CMD] = CMD_LJ_RM_TEST;
 		sysbusRsp->data[WD_PRD] = MY_PRD_ID;