diff --git a/WHATSNEW b/WHATSNEW
index b584694b3..3a65c2d38 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -80,6 +80,10 @@ Fixed bugs:
    Channel based copy fails.
    Bugzilla Reports 53102 and 54397
 
+ * Javadoc.postProcessGeneratedJavadocs() fails for Classes that
+   extend Javadoc
+   Bugzilla Report 56047
+
 Other changes:
 --------------
 
diff --git a/src/main/org/apache/tools/ant/taskdefs/Javadoc.java b/src/main/org/apache/tools/ant/taskdefs/Javadoc.java
index f0e7bb166..4d6659f2d 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Javadoc.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Javadoc.java
@@ -2474,7 +2474,7 @@ public class Javadoc extends Task {
             return;
         }
         final String fixData;
-        final InputStream in = getClass()
+        final InputStream in = Javadoc.class
             .getResourceAsStream("javadoc-frame-injections-fix.txt");
         if (in == null) {
             throw new FileNotFoundException("Missing resource "