diff --git a/README.md b/README.md
index 89adb548..279cf8a5 100644
--- a/README.md
+++ b/README.md
@@ -86,7 +86,7 @@ to the correct Python installation.
 
 ### Understanding PATH
 
-When you run a command like `python` or `pip`, your operating system
+When you run a command like `python` or `pip`, your shell (bash / zshrc / ...)
 searches through a list of directories to find an executable file with
 that name. This list of directories lives in an environment variable
 called `PATH`, with each directory in the list separated by a colon: