--- a/src/java.desktop/unix/native/common/awt/img_util_md.h	Tue Feb 13 10:36:52 2018 +0100
+++ b/src/java.desktop/unix/native/common/awt/img_util_md.h	Tue Feb 13 10:37:33 2018 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1996, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -23,6 +23,7 @@
  * questions.
  */
 
+#include "jni.h"
 #include "color.h"
 
 #if !defined(HEADLESS) && !defined(MACOSX)
@@ -101,7 +102,7 @@
 
 extern void freeICMColorData(ColorData *pData);
 
-extern void initInverseGrayLut(int* prgb, int rgbsize, ColorData* cData);
+JNIEXPORT void initInverseGrayLut(int* prgb, int rgbsize, ColorData* cData);
 extern unsigned char* initCubemap(int* cmap, int cmap_len, int cube_dim);
 extern void initDitherTables(ColorData* cData);