diff --git a/thirdparty/org.apache.cactus/META-INF/MANIFEST.MF b/thirdparty/org.apache.cactus/META-INF/MANIFEST.MF
index 50ff90f..01c30e9 100644
--- a/thirdparty/org.apache.cactus/META-INF/MANIFEST.MF
+++ b/thirdparty/org.apache.cactus/META-INF/MANIFEST.MF
@@ -7,3 +7,4 @@
 Eclipse-LazyStart: true
 Bundle-Vendor: %Bundle-Vendor.0
 Bundle-ClassPath: .
+Bundle-RequiredExecutionEnvironment: J2SE-1.4