diff --git a/jalopy/project.xml b/jalopy/project.xml
index 54b01e34..e3a2d73d 100644
--- a/jalopy/project.xml
+++ b/jalopy/project.xml
@@ -92,6 +92,9 @@
       <groupId>plexus</groupId>
       <artifactId>plexus-utils</artifactId>
       <version>1.0.3</version>
+      <properties>
+        <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
+      </properties>
     </dependency>
     <dependency>
       <groupId>commons-logging</groupId>