Declared dependency is not included when there exist an exclusion of the artifact in another dependency

I have declared a dependency (commons-collections), but I also have an exclusion of commons-collections in another dependency. In this case commons-collection is not added to the classpath. Part of my POM:

<project>
...
<dependencies>
...
<!-- Hibernate -->
<dependency>
<groupId>hibernate</groupId>
<artifactId>hibernate</artifactId>
<version>3.0.5</version>

<exclusions>
...
<exclusion>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
</exclusion>
...
</exclusions>
...
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.1</version>
</dependency>

</dependencies>
...
</project>