Index: book.xml
===================================================================
--- book.xml
+++ book.xml
@@ -6324,7 +6324,7 @@
 	    UART chip. The second uses the same kind of chip but is on
 	    IRQ3 and is at port address <literal>0x2f8</literal>.
 	    Internal modem cards are treated just like serial ports, 
-	    except that the always have a modem attached to the
+	    except that they always have a modem attached to the
 	    port.</para>
 
 	  <para>The <filename>GENERIC</filename> kernel includes