diff --git a/ArduCopter/events.cpp b/ArduCopter/events.cpp
index 80a3abcdc8..b18505ae45 100644
--- a/ArduCopter/events.cpp
+++ b/ArduCopter/events.cpp
@@ -274,7 +274,7 @@ void Copter::failsafe_terrain_set_status(bool data_ok)
 void Copter::failsafe_terrain_on_event()
 {
     failsafe.terrain = true;
-    gcs().send_text(MAV_SEVERITY_CRITICAL,"故障保护:地形数据丢失"");//Failsafe: Terrain data missing
+    gcs().send_text(MAV_SEVERITY_CRITICAL,"故障保护:地形数据丢失");//Failsafe: Terrain data missing
     AP::logger().Write_Error(LogErrorSubsystem::FAILSAFE_TERRAIN, LogErrorCode::FAILSAFE_OCCURRED);
 
     if (should_disarm_on_failsafe()) {