diff --git a/FAQ.md b/FAQ.md
index ecbcd90..6406b08 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -199,5 +199,7 @@ It will wait, and call your callback with a connection after one becomes availab
 
 ### 18. (New Question) Is there a way to check if I have an active connection?
 
+### 19. (New Question) Do I correctly assume that calling done() or done(err) more than once (multiple times) has no side-effects?
+
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