diff --git a/mars.md b/mars.md
index ef9fc6e..cd63196 100644
--- a/mars.md
+++ b/mars.md
@@ -7,7 +7,7 @@ https://bbs.kanxue.com/thread-286611.htm
  cd mars
  python3 build_osx.py
  cd  cmake_build/OSX/Darwin.out
- ar -x *.a
+ ar -x libxlog.a
 for f in *.o; do
     /Applications/IDA\ Professional\ 9.1.app/Contents/MacOS/tools/flair/pmacho "$f"
 done