diff --git a/WHATSNEW b/WHATSNEW
index 6c090c2a0..65c747513 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -26,6 +26,10 @@ Changes that could break older environments:
  * The Log4jListener is marked as deprecated as the required log4j library
    (in version 1.x) is not maintained any more.
 
+ * Image task is marked as deprecated as the required JAI library is not
+   maintained any more and internal APIs that JAI depended on are no longer
+   available in Java 9.
+
 Fixed bugs:
 -----------
 
diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/image/Image.java b/src/main/org/apache/tools/ant/taskdefs/optional/image/Image.java
index b4f173d8a..6ab58c034 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/image/Image.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/image/Image.java
@@ -53,9 +53,12 @@ import com.sun.media.jai.codec.FileSeekableStream;
  * href="http://java.sun.com/products/java-media/jai/forDevelopers/jai1_0_1guide-unc/">
  * JAI Programming Guide</a>.
  *
+ * @deprecated JAI is not developed any more. Internal APIs that JAI depends on were
+ * scheduled for removal in Java 7 and finally removed in Java 9.
  * @see org.apache.tools.ant.types.optional.image.ImageOperation
  * @see org.apache.tools.ant.types.DataType
  */
+@Deprecated
 public class Image extends MatchingTask {
     // CheckStyle:VisibilityModifier OFF - bc
     protected Vector<ImageOperation> instructions = new Vector<>();