diff --git a/Known-Issues.md b/Known-Issues.md
index f8cbc2b..0e91278 100644
--- a/Known-Issues.md
+++ b/Known-Issues.md
@@ -43,4 +43,4 @@ Traceback (most recent call last):
     out = __main__.output['eventstruct']
 KeyError: 'eventstruct'
 ```
-**Fix:** You have to manually update the `xpp` submodule. To do that, go into the `lib/xpp` folder and execute `git checkout master`. After that you can go back into the `build` folder and run `make` again.
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+**Fix:** You have to manually update the `xpp` submodule. To do that, go into the `lib/xpp` folder and execute `git checkout master` and `rm include/xpp/proto/*`, the second command deletes the already generated, but faulty, headers. After that you can go back into the `build` folder and run `make` again.
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