diff --git a/de.prob.units/plugin.xml b/de.prob.units/plugin.xml
index b749f07c97497b79b3d4fb8cc1e62f415f8026a4..b638b268a7251133e354a7fef6595000bf4bc7fd 100644
--- a/de.prob.units/plugin.xml
+++ b/de.prob.units/plugin.xml
@@ -119,9 +119,6 @@
             id="machineAttributeProcessor"
             name="machineAttributeProcessor"
             parent="org.eventb.core.machineModule">
-         <prereq
-               id="org.eventb.core.machineVariableModule">
-         </prereq>
       </processorType>
       <processorType
             class="de.prob.units.sc.ContextAttributeProcessor"