diff --git a/Visual-Studio-Code.md b/Visual-Studio-Code.md
index 38b2b5c..9a1696b 100644
--- a/Visual-Studio-Code.md
+++ b/Visual-Studio-Code.md
@@ -71,6 +71,10 @@ Now you may start using the features of vscode-ccls with your development projec
 
 * Open the project root with "Open Folder" (<kbd>C-k C-o</kbd>)
 
+### `ccls.clang.resourceDir`
+
+On Macos you might run into issues with certain includes (`stddef.h stdint.h`) not being found. To fix this you need to set the resource directory to the output of `clang -print-resource-dir`. The default value is hardcoded at ccls _compile_ time, so unless you compile it yourself this will not work.
+
 ### Semantic highlight
 
 <img src="https://raw.githubusercontent.com/MaskRay/ccls-static/master/vscode-ccls/highlight.webp" title="semantic highlight">