diff --git a/build.xml b/build.xml
index 8c237498..dfd5513d 100644
--- a/build.xml
+++ b/build.xml
@@ -124,6 +124,7 @@
 			<fileset refid="lwjgl.fileset" />
 			<manifest>
 				<attribute name="Sealed" value="true"/>
+				<attribute name="Trusted-Library" value="true"/>
 			</manifest>
 		</jar>
 		
@@ -132,6 +133,7 @@
 			<fileset refid="lwjgl_util_applet.fileset" />
 			<manifest>
 				<attribute name="Sealed" value="true"/>
+				<attribute name="Trusted-Library" value="true"/>
 			</manifest>
 		</jar>