diff --git a/jcoverage/plugin.jelly b/jcoverage/plugin.jelly
index 34f97929..3eaee95e 100644
--- a/jcoverage/plugin.jelly
+++ b/jcoverage/plugin.jelly
@@ -105,6 +105,7 @@
       <instrument todir="${maven.jcoverage.instrumentation}">
         <ant:fileset dir="${maven.build.dest}">
           <ant:include name="**/*.class" />
+          <ant:exclude name="${maven.jcoverage.instrumentation.excludes}" />
         </ant:fileset>
         <ant:classpath>
           <ant:path refid="jcoverage.classpath"/>
diff --git a/jcoverage/plugin.properties b/jcoverage/plugin.properties
index 007a8301..6aaddb73 100644
--- a/jcoverage/plugin.properties
+++ b/jcoverage/plugin.properties
@@ -3,3 +3,4 @@ maven.jcoverage.instrumentation=${maven.jcoverage.dir}/classes
 maven.jcoverage.database.dir=${maven.jcoverage.dir}/database
 maven.jcoverage.junit.fork=yes
 maven.jcoverage.report.template=maven
+maven.jcoverage.instrumentation.excludes=NOT_DEFINED
\ No newline at end of file
diff --git a/jcoverage/xdocs/properties.xml b/jcoverage/xdocs/properties.xml
index 10c65dd7..f02c1d51 100644
--- a/jcoverage/xdocs/properties.xml
+++ b/jcoverage/xdocs/properties.xml
@@ -30,6 +30,14 @@
             Specifies the build directory for the instrumented classes.
           </td>
         </tr>
+        <tr>
+          <td>maven.jcoverage.instrumentation.excludes</td>
+          <td>Not defined</td>
+          <td>Yes</td>
+          <td>
+            Specifies the pattern for the excluded classes of instrumentation.
+          </td>
+        </tr>
         <!--tr>
           <td>maven.jcoverage.database.dir</td>
           <td>${maven.jcoverage.dir}/database</td>