diff --git a/multi/multi__developer_guide.html b/multi/multi__developer_guide.html
index a74364be..eeabed68 100644
--- a/multi/multi__developer_guide.html
+++ b/multi/multi__developer_guide.html
@@ -12,7 +12,7 @@
 		<span xmlns:d="http://docbook.org/ns/docbook" class="hl-comment">// grab configuration from Config object</span>
 		<span xmlns:d="http://docbook.org/ns/docbook" class="hl-keyword">return</span> (exchange, chain) -&gt; {
             <span xmlns:d="http://docbook.org/ns/docbook" class="hl-comment">//If you want to build a "pre" filter you need to manipulate the</span>
-            <span xmlns:d="http://docbook.org/ns/docbook" class="hl-comment">//request before calling change.filter</span>
+            <span xmlns:d="http://docbook.org/ns/docbook" class="hl-comment">//request before calling chain.filter</span>
             ServerHttpRequest.Builder builder = exchange.getRequest().mutate();
             <span xmlns:d="http://docbook.org/ns/docbook" class="hl-comment">//use builder to manipulate the request</span>
             <span xmlns:d="http://docbook.org/ns/docbook" class="hl-keyword">return</span> chain.filter(exchange.mutate().request(request).build());
diff --git a/single/spring-cloud-gateway.html b/single/spring-cloud-gateway.html
index 338cc735..8df82aa2 100644
--- a/single/spring-cloud-gateway.html
+++ b/single/spring-cloud-gateway.html
@@ -673,7 +673,7 @@ spring.cloud.gateway.discovery.locator.filters[1].args[replacement]: "'/${remain
 		<span xmlns:d="http://docbook.org/ns/docbook" class="hl-comment">// grab configuration from Config object</span>
 		<span xmlns:d="http://docbook.org/ns/docbook" class="hl-keyword">return</span> (exchange, chain) -&gt; {
             <span xmlns:d="http://docbook.org/ns/docbook" class="hl-comment">//If you want to build a "pre" filter you need to manipulate the</span>
-            <span xmlns:d="http://docbook.org/ns/docbook" class="hl-comment">//request before calling change.filter</span>
+            <span xmlns:d="http://docbook.org/ns/docbook" class="hl-comment">//request before calling chain.filter</span>
             ServerHttpRequest.Builder builder = exchange.getRequest().mutate();
             <span xmlns:d="http://docbook.org/ns/docbook" class="hl-comment">//use builder to manipulate the request</span>
             <span xmlns:d="http://docbook.org/ns/docbook" class="hl-keyword">return</span> chain.filter(exchange.mutate().request(request).build());
diff --git a/spring-cloud-gateway.xml b/spring-cloud-gateway.xml
index 1a902a6a..496080e2 100644
--- a/spring-cloud-gateway.xml
+++ b/spring-cloud-gateway.xml
@@ -4,7 +4,7 @@
 <book xmlns="http://docbook.org/ns/docbook" xmlns:xl="http://www.w3.org/1999/xlink" version="5.0" xml:lang="en">
 <info>
 <title>Spring Cloud Gateway</title>
-<date>2019-01-07</date>
+<date>2019-01-08</date>
 </info>
 <preface>
 <title></title>
@@ -1615,7 +1615,7 @@ management.endpoints.web.exposure.include=gateway</programlisting>
 		// grab configuration from Config object
 		return (exchange, chain) -&gt; {
             //If you want to build a "pre" filter you need to manipulate the
-            //request before calling change.filter
+            //request before calling chain.filter
             ServerHttpRequest.Builder builder = exchange.getRequest().mutate();
             //use builder to manipulate the request
             return chain.filter(exchange.mutate().request(request).build());