diff --git a/doc/arm/notes.xml b/doc/arm/notes.xml
index c7e563ef42..be56342e1d 100644
--- a/doc/arm/notes.xml
+++ b/doc/arm/notes.xml
@@ -50,7 +50,7 @@
 	  when parsing certain malformed DNSSEC keys.
 	</para>
 	<para>
-	  This flaw was discovered by Hanno B&ouml;ck of the Fuzzing
+	  This flaw was discovered by Hanno Boeck of the Fuzzing
 	  Project, and is disclosed in CVE-2015-5722. [RT #40212]
 	</para>
       </listitem>