diff --git a/prologue/why.xml b/prologue/why.xml
index 905e429d6..ed4bd04a8 100644
--- a/prologue/why.xml
+++ b/prologue/why.xml
@@ -169,7 +169,7 @@
       <listitem>
         <para>GMP</para>
 
-        <para>This package contains math libraries and has useful functions for
+        <para>This package contains math libraries that have useful functions for
         arbitrary precision arithmetic.  It is required to build Gcc. </para>
       </listitem>