diff --git a/doc/arm/reference.rst b/doc/arm/reference.rst
index bc10c6d33a..b2683d84a9 100644
--- a/doc/arm/reference.rst
+++ b/doc/arm/reference.rst
@@ -5913,7 +5913,7 @@ to achieve Strict TLS, one needs to use :any:`remote-hostname` and, optionally,
 outgoing connections (e.g. the ones used to download zone from
 primaries via TLS). Providing any of the mentioned options will enable
 server authentication. If :any:`remote-hostname` is provided but :any:`ca-file` is
-missed, then the platform-specific certificate authority certificates
+missing, then the platform-specific certificate authority certificates
 are used for authentication. The set roughly corresponds to the one
 used by WEB-browsers to authenticate HTTPS hosts. On the other hand,
 if :any:`ca-file` is provided but :any:`remote-hostname` is missing, then the