diff --git a/de.prob.units/plugin.xml b/de.prob.units/plugin.xml
index 7ba49ece85be61cfa4af4ba5bf0db1f58e8caf21..b749f07c97497b79b3d4fb8cc1e62f415f8026a4 100644
--- a/de.prob.units/plugin.xml
+++ b/de.prob.units/plugin.xml
@@ -128,9 +128,6 @@
             id="contextAttributeProcessor"
             name="contextAttributeProcessor"
             parent="org.eventb.core.contextModule">
-         <prereq
-               id="org.eventb.core.contextConstantModule">
-         </prereq>
       </processorType>
    </extension>
 </plugin>