diff --git a/documentation/BuildingR3.13ExtensionsWithR3.14.html b/documentation/BuildingR3.13ExtensionsWithR3.14.html
index c3dffa2a0..80cb4f375 100644
--- a/documentation/BuildingR3.13ExtensionsWithR3.14.html
+++ b/documentation/BuildingR3.13ExtensionsWithR3.14.html
@@ -17,12 +17,12 @@ EPICS R3.13 extensions have both a Makefile and a Makefile.Host in the build
 directories and the EPICS R3.13 extension tree has an extensions/config
 directory.</p>
 
-<h3>Prerequsite building R3.13 extensions</h3>
+<h3>Prerequisite for building R3.13 extensions</h3>
 
 <blockquote>
   <ul>
     <li>The macro COMPAT_TOOLS_313 must be set to YES in base/configure/CONFIG_SITE
-        before the base build? If it was not set, set it to YES and then do a gmake
+        before the base build. If it was not set, set it to YES and then do a gmake
         in the base/config/tools directory. This will install some perl scripts needed
         for building R3.13 extensions.
     </li>