diff --git a/spring-webflow-reference/src/defining-flows.xml b/spring-webflow-reference/src/defining-flows.xml
index f76c422b..2774cfa0 100644
--- a/spring-webflow-reference/src/defining-flows.xml
+++ b/spring-webflow-reference/src/defining-flows.xml
@@ -297,7 +297,7 @@ public interface FlowOutcome {
 				</para>
 			</sect3>
 			<sect3 id="input-element-required">
-				<title>Marking a input as required</title>
+				<title>Marking an input as required</title>
 				<para>
 					Use the <code>required</code> attribute to enforce the input is not null or empty:
 				</para>