diff --git a/README.md b/README.md
index 12e5b92..e3fcfeb 100644
--- a/README.md
+++ b/README.md
@@ -12,3 +12,8 @@ Usage
 ```
 cmake -DCMAKE_MODULE_PATH:PATH=<cmake-d-dir>/cmake-d <path-to-source>
 ```
+
+*Note:*
+- use absolute path for CMAKE_MODULE_PATH
+- Because cmake internally uses relative paths, on Windows, \<cmake-d-dir\> and cmake installation need to be installed on the same drive.
+