diff --git a/How-to-debug-le.sh.md b/How-to-debug-le.sh.md
index f0522d5..5fd9c15 100644
--- a/How-to-debug-le.sh.md
+++ b/How-to-debug-le.sh.md
@@ -1,7 +1,14 @@
-Defining a macro `DEBUG=1` can make `le.sh` output detailed debug info.
+Use `--debug` parameter to output detailed debug info.
 
 For example:
 
 ```
-DEBUG=1  le.sh  issue  /home/.............
+le.sh  --issue  /home/.............   --debug
+```
+
+
+To output more detailed info:
+
+```
+le.sh  --issue  /home/............    --debug 2
 ```
\ No newline at end of file