diff --git a/2019/2019-09-09_testCourseAdv/slides/kdiff3Install2.md b/2019/2019-09-09_testCourseAdv/slides/kdiff3Install2.md
index 049beea8566241b297a85f5c781e02257a0ad717..70e8742d9009053451f685492d93a01d0ea9d689 100644
--- a/2019/2019-09-09_testCourseAdv/slides/kdiff3Install2.md
+++ b/2019/2019-09-09_testCourseAdv/slides/kdiff3Install2.md
@@ -9,3 +9,5 @@ git config --global --add diff.guitool kdiff3
 git config --global --add difftool.kdiff3.path " <Kdiff3 path> "
 git config --global --add difftool.kdiff3.trustExitCode false
 ```
+
+* Note: omit `" "` when setting up on linux or mac
\ No newline at end of file