diff --git a/doc/gm.md b/doc/gm.md
index d497a96..d00fda8 100644
--- a/doc/gm.md
+++ b/doc/gm.md
@@ -25,7 +25,7 @@ http://192.168.0.206:8881/addexp
 | --- | --- | 
 |0|成功|
 |其他|错误|
-|-100|返回值错误|
+|-100|程序内部函数调用返回值错误|
 |-101|角色id未填写|
 |-102|角色不存在|
 
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libgit2 0.21.2