--- a/src/main/java/org/apache/maven/doxia/tools/DefaultSiteTool.java
+++ b/src/main/java/org/apache/maven/doxia/tools/DefaultSiteTool.java
@@ -1245,7 +1245,6 @@
                                                                           inputEncoding, outputEncoding );
 
             decoration = readDecorationModel( siteDescriptorContent );
-            decoration.setLastModified( siteDescriptorLastModified );
         }
 
         MavenProject parentProject = getParentProject( project, reactorProjects, localRepository );