diff -r 1c8b81ff863e -r 75686e8da573 src/java.desktop/share/classes/java/awt/image/IndexColorModel.java
--- a/src/java.desktop/share/classes/java/awt/image/IndexColorModel.java	Wed Nov 22 13:52:48 2017 -0800
+++ b/src/java.desktop/share/classes/java/awt/image/IndexColorModel.java	Wed Nov 22 14:04:51 2017 -0800
@@ -755,7 +755,7 @@
      * value is used to mask off the pixel parameters for methods such
      * as getRed(), getGreen(), getBlue(), getAlpha(), and getRGB().
      */
-    private final void calculatePixelMask() {
+    private void calculatePixelMask() {
         // Note that we adjust the mask so that our masking behavior here
         // is consistent with that of our native rendering loops.
         int maskbits = pixel_bits;