diff --git a/docs/devnotes.md b/docs/devnotes.md
index 4d04c08..cf6e9a0 100644
--- a/docs/devnotes.md
+++ b/docs/devnotes.md
@@ -46,6 +46,6 @@ Use physical directions to avoid trouble, like "margin-top, margin-bottom".
 
 ## Safe area insets
 
-For isolating control of the UI effect, we already setup css variables `--safe-area-insets-*`. In components, you should use the variables unless you have reasons to use `env()`.
+For isolating control of the UI effect, we already setup css variables `--safe-area-inset-*`. In components, you should use the variables unless you have reasons to use `env()`.
 
-Using `--safe-area-insets-*`, you can control the global value in settings (under dev mode).
+Using `--safe-area-inset-*`, you can control the global value in settings (under dev mode).