diff --git a/build.xml b/build.xml
index 5c5824d1..882f8faf 100644
--- a/build.xml
+++ b/build.xml
@@ -392,6 +392,7 @@
 		</javah>
 		<!-- lwjgl -->
 		<javah classpath="${lwjgl.bin}" destdir="${lwjgl.src.headers}" force="yes">
+			<class name="org.lwjgl.DefaultSysImplementation" />
 			<class name="org.lwjgl.input.Cursor" />
 			<class name="org.lwjgl.input.Keyboard" />
 			<class name="org.lwjgl.input.Mouse" />