diff --git a/src/modbus_slave.c b/src/modbus_slave.c
index 957927a..f672719 100644
--- a/src/modbus_slave.c
+++ b/src/modbus_slave.c
@@ -65,6 +65,8 @@ static void modbus_frame_error_callback(void);
  */
 void register_app_data_to_modbus_slave_coils_table(modbus_adr_t coil_adr, modbus_coil_disin_t *app_data_ptr)
 {
+    uint8_t a[3];
+    a[4]=5;
     register_app_data_to_modbus_coils_din_table(Slave_Coils, coil_adr, app_data_ptr);
 }