--- a/jdk/src/windows/classes/sun/java2d/d3d/D3DBlitLoops.java	Wed Jul 05 18:09:43 2017 +0200
+++ b/jdk/src/windows/classes/sun/java2d/d3d/D3DBlitLoops.java	Thu Jun 07 18:05:09 2012 -0700
@@ -32,6 +32,7 @@
 import java.awt.image.BufferedImage;
 import java.awt.image.BufferedImageOp;
 import java.lang.ref.WeakReference;
+import javax.tools.annotation.GenerateNativeHeader;
 import sun.java2d.ScreenUpdateManager;
 import sun.java2d.SurfaceData;
 import sun.java2d.loops.Blit;
@@ -47,6 +48,8 @@
 import static sun.java2d.pipe.BufferedOpCodes.*;
 import sun.java2d.windows.GDIWindowSurfaceData;
 
+/* No native methods here, but the constants are needed in the supporting JNI code */
+@GenerateNativeHeader
 class D3DBlitLoops {
 
     static void register() {