diff --git a/docs/faq.md b/docs/faq.md
index 8bcd28a59..784800409 100644
--- a/docs/faq.md
+++ b/docs/faq.md
@@ -78,6 +78,9 @@ This minimizes your use of the context window, as well as costs.
 
 ## Aider isn't editing my files?
 
+Sometimes GPT will reply with some code changes that won't get applied to your local files.
+In these cases, aider might say something like "Failed to apply edit to *filename*".
+
 This usually happens because GPT is not specifying the edits
 to make in the format that aider expects.
 GPT-3.5 is especially prone to disobeying the system prompt instructions in this manner, but it also happens with GPT-4.