--- a/jdk/src/share/classes/sun/java2d/opengl/OGLBlitLoops.java	Wed Jul 05 18:09:43 2017 +0200
+++ b/jdk/src/share/classes/sun/java2d/opengl/OGLBlitLoops.java	Thu Jun 07 18:05:09 2012 -0700
@@ -44,7 +44,10 @@
 import sun.java2d.pipe.RenderBuffer;
 import sun.java2d.pipe.RenderQueue;
 import static sun.java2d.pipe.BufferedOpCodes.*;
+import javax.tools.annotation.GenerateNativeHeader;
 
+/* No native methods here, but the constants are needed in the supporting JNI code */
+@GenerateNativeHeader
 class OGLBlitLoops {
 
     static void register() {