diff --git a/simgear/scene/tsync/terrasync.cxx b/simgear/scene/tsync/terrasync.cxx
index 8d3516d0..3f44070d 100644
--- a/simgear/scene/tsync/terrasync.cxx
+++ b/simgear/scene/tsync/terrasync.cxx
@@ -1356,7 +1356,7 @@ void SGTerraSync::update(double)
 
         //zhongjin
         //NAPTR 查询失败后处理
-        _retryTime =  SGTimeStamp::now() -S GTimeStamp::fromSec(seconds);
+        _retryTime =  SGTimeStamp::now() - SGTimeStamp::fromSec(seconds);
         //end