diff --git a/FAQ.md b/FAQ.md
index 6aec6a7..53a9812 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -123,7 +123,9 @@ The solution here is to determine how much memory is available, or in other word
 
 The third solution is to run your program an print `jsonBuffer.size()` to get the current size of the buffer.
 
-**WARNING**: if you use `String` to create your JSON keys or values, there content will automatically be duplicated in the `JsonBuffer`, so you need to add the total length of all strings in the size of the `JsonBuffer`.
+**WARNING 1**: if you pass a `String` or a `const char*` to `parseArray()` or `parseObject`, the `JsonBuffer` will make a copy of the input, so it will need to be significantly bigger.
+
+**WARNING 2**: if you use `String` to create your JSON keys or values, their content will automatically be duplicated in the `JsonBuffer`, so you need to add the total length of all strings in the size of the `JsonBuffer`.
 
 See issue [#243](https://github.com/bblanchon/ArduinoJson/issues/243)