diff --git a/sigil/common/core/sigil.properties b/sigil/common/core/sigil.properties
index 086b1c3..4d52aab 100644
--- a/sigil/common/core/sigil.properties
+++ b/sigil/common/core/sigil.properties
@@ -56,6 +56,9 @@
 	org.eclipse.core.runtime, \
 	org.osgi.framework, \
 
+-requires: \
+	org.eclipse.equinox.common;version=3.4.0, \
+
 header;Bundle-ActivationPolicy: lazy
 
 # end