diff --git a/releng/org.eclipse.cdt.releng/build.xml b/releng/org.eclipse.cdt.releng/build.xml
index e65e2e53807..4131fa5eac3 100644
--- a/releng/org.eclipse.cdt.releng/build.xml
+++ b/releng/org.eclipse.cdt.releng/build.xml
@@ -108,6 +108,7 @@
 		<replace file="${buildDirectory}/site/eclipse/site.xml">
 			<replacefilter token="@buildVersion@" value="${branchVersion}.${timestamp}"/>
 		</replace>
+		<copy file="pack.properties" todir="${buildDirectory}/site/eclipse"/>
 		<!-- for some reason LPG isn't getting picked up-->
 		<copy file="${buildDirectory}/plugins/net.sourceforge.lpg.lpgjavaruntime_1.1.0.v200706111738.jar"
 			todir="${buildDirectory}/site/eclipse/plugins"/>
diff --git a/releng/org.eclipse.cdt.releng/pack.properties b/releng/org.eclipse.cdt.releng/pack.properties
new file mode 100644
index 00000000000..1cb5a5e114c
--- /dev/null
+++ b/releng/org.eclipse.cdt.releng/pack.properties
@@ -0,0 +1 @@
+pack200.default.args=-E4