diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index ae0cedc889..106da528b8 100644
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -9742,7 +9742,7 @@ ns.domain.com.rpz-nsdname   CNAME   .
 	    contents of DNS responses are likely to be attacks on the
 	    DNS server itself.
 	    They usually should be discarded before the DNS server
-	    spends resources make TCP connections or parsing DNS requesets,
+	    spends resources making TCP connections or parsing DNS requests,
 	    but that rate limiting must be done before the
 	    DNS server sees the requests.
 	  </para>