diff --git a/src/reference/asciidoc/mqtt.adoc b/src/reference/asciidoc/mqtt.adoc
index 2d2f993c3e..6237ae0d5a 100644
--- a/src/reference/asciidoc/mqtt.adoc
+++ b/src/reference/asciidoc/mqtt.adoc
@@ -23,10 +23,12 @@ A minimal configuration might be:
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