minor grammar fix

diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index 34a493797d043893ae43ed0c20318fc55867eda9..1766c83bc32420505bbe651f592b34d5145f8725 100644 (file)
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -10666,7 +10666,7 @@ example.com                 CNAME   rpz-tcp-only.
          <para>
            With both methods when named gets a NXDOMAIN response
            it examines a seperate namespace to see if the NXDOMAIN
-           response should be replaced with a alternative response.
+           response should be replaced with an alternative response.
          </para>
          <para>
            With a redirect zone (<command>zone "." { type redirect; };</command>), the