diff --git a/dji_sdk/include/dji_sdk/dji_drone.h b/dji_sdk/include/dji_sdk/dji_drone.h
index 4572ceb..ae8078f 100644
--- a/dji_sdk/include/dji_sdk/dji_drone.h
+++ b/dji_sdk/include/dji_sdk/dji_drone.h
@@ -295,7 +295,7 @@ class DJIDrone
         odometry_subscriber = nh.subscribe<nav_msgs::Odometry>("dji_sdk/odometry",10, &DJIDrone::odometry_subscriber_callback, this);
         sdk_permission_subscriber = nh.subscribe<std_msgs::UInt8>("dji_sdk/sdk_permission", 10, &DJIDrone::sdk_permission_subscriber_callback, this);
 		time_stamp_subscriber = nh.subscribe<dji_sdk::TimeStamp>("dji_sdk/time_stamp", 10, &DJIDrone::time_stamp_subscriber_callback,this);
-		mission_state_subscriber = nh.subscribe<dji_sdk::MissionPushInfo>("dji_sdk/missino_state", 10, &DJIDrone::mission_state_push_info_callback, this);  
+		mission_state_subscriber = nh.subscribe<dji_sdk::MissionPushInfo>("dji_sdk/mission_state", 10, &DJIDrone::mission_state_push_info_callback, this);  
 		mission_event_subscriber = nh.subscribe<dji_sdk::MissionPushInfo>("dji_sdk/mission_event", 10, &DJIDrone::mission_event_push_info_callback, this);
 	}
 
diff --git a/dji_sdk_demo/src/client.cpp b/dji_sdk_demo/src/client.cpp
index 96091c8..770b235 100644
--- a/dji_sdk_demo/src/client.cpp
+++ b/dji_sdk_demo/src/client.cpp
@@ -66,6 +66,7 @@ int main(int argc, char **argv)
     Display_Main_Menu();
     while(1)
     {
+		ros::spinOnce();
         temp32 = getchar();
         if(temp32 != 10)
         {