diff --git a/src/main/java/org/codelibs/jhighlight/servlet/HighlightFilter.java b/src/main/java/org/codelibs/jhighlight/servlet/HighlightFilter.java
index 3862ce8..758e141 100644
--- a/src/main/java/org/codelibs/jhighlight/servlet/HighlightFilter.java
+++ b/src/main/java/org/codelibs/jhighlight/servlet/HighlightFilter.java
@@ -244,5 +244,13 @@ public final class HighlightFilter implements Filter
 		{
 			return mOutput.toByteArray();
 		}
+
+		public void setWriteListener(javax.servlet.WriteListener listener) {
+                        throw new UnsupportedOperationException("Not implemented yet.");
+		}
+
+		public boolean isReady() {
+                        return false;
+		}
 	}
 }
-- 
2.33.0