diff --git a/scm-plugins/pom.xml b/scm-plugins/pom.xml
index 441e72793c..988e0bcf0a 100644
--- a/scm-plugins/pom.xml
+++ b/scm-plugins/pom.xml
@@ -137,6 +137,8 @@
         <directory>src/main/resources</directory>
         <filtering>false</filtering>
         <excludes>
+          <!-- We have to exclude the plugin.xml file here, because it has to be written -->
+          <!-- by the smp maven plugin. -->
           <exclude>META-INF/scm/plugin.xml</exclude>
           <exclude>sonia/scm/version/*</exclude>
         </excludes>