diff --git a/FAQ.md b/FAQ.md
index 7086a1a71a..280f85f3dd 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -3053,6 +3053,8 @@ Example conditions:
 
 ```COALESCE(message("language")) == "en"```
 
+Note that *message("name")* returns an array. COALESCE returns the first value of an array, so it can be compared with a string value.
+
 <br>
 
 **Actions**
diff --git a/index.html b/index.html
index 70ff44ec89..bf32b0762e 100644
--- a/index.html
+++ b/index.html
@@ -1676,6 +1676,7 @@ X-Google-Original-From: Somebody &lt;somebody+extra@example.org&gt;</code></pre>
 <p><code>(received + 7*24*60*60*1000) &lt; DT_DATE_TO_EPOCH(DT_NOW())</code></p>
 <p><code>AI("Is the message below a scam? Answer in English with just yes or no.") contains "yes"</code></p>
 <p><code>COALESCE(message("language")) == "en"</code></p>
+<p>Note that <em>message(“name”)</em> returns an array. COALESCE returns the first value of an array, so it can be compared with a string value.</p>
 <p><br></p>
 <p><strong>Actions</strong></p>
 <p>You can select one of these actions to apply to matching messages:</p>