diff --git a/src/main/java/teetime/stage/InstanceOfFilter.java b/src/main/java/teetime/stage/InstanceOfFilter.java
index 791b2da2ecc1089ef3e70018e48d2264ec542ee9..5f09910372c23ad8f03b78af6f295a8cfe76cc65 100644
--- a/src/main/java/teetime/stage/InstanceOfFilter.java
+++ b/src/main/java/teetime/stage/InstanceOfFilter.java
@@ -56,7 +56,7 @@ public final class InstanceOfFilter<I, O extends I> extends AbstractConsumerStag
 
 	/**
 	 *
-	 * @return the output port that outputs
+	 * @return the output port that is used when the element is a (sub)type of the internal type attribute
 	 *
 	 * @deprecated 1.1. Use {@link #getMatchedOutputPort()} instead.
 	 */