diff --git a/de.prob.core/META-INF/MANIFEST.MF b/de.prob.core/META-INF/MANIFEST.MF
index 920302a9f312037a86b4c70402d301892a0b45c8..151878e9e02e3bf6eca7fdeebf59cd5ebcd50f84 100644
--- a/de.prob.core/META-INF/MANIFEST.MF
+++ b/de.prob.core/META-INF/MANIFEST.MF
@@ -6,6 +6,7 @@ Bundle-Version: 9.4.0.qualifier
 Require-Bundle: org.eclipse.core.runtime;bundle-version="[3.5.0,4.0.0)",
  org.rodinp.core;bundle-version="[1.3.1,1.7.0)",
  org.eventb.core;bundle-version="[2.5.0,3.0.0)",
+ org.eventb.core.ast;bundle-version="[2.5.0,3.0.0)",
  org.eventb.theory.core;bundle-version="[2.0.0,3.0.0)";resolution:=optional
 Bundle-ActivationPolicy: lazy
 Eclipse-BundleShape: dir