diff --git a/protected/java/src/org/broadinstitute/sting/gatk/walkers/annotator/QualByDepth.java b/protected/java/src/org/broadinstitute/sting/gatk/walkers/annotator/QualByDepth.java
index ee4b8910d..92c8742ac 100644
--- a/protected/java/src/org/broadinstitute/sting/gatk/walkers/annotator/QualByDepth.java
+++ b/protected/java/src/org/broadinstitute/sting/gatk/walkers/annotator/QualByDepth.java
@@ -68,7 +68,7 @@ import java.util.List;
 import java.util.Map;
 
 /**
- * Variant confidence (from the QUAL field) / unfiltered depth of non-reference samples.
+ * Variant confidence (from the QUAL field) / unfiltered depth of non-reference samples.  Note that the QD is also normalized by event length.
  *
  * Low scores are indicative of false positive calls and artifacts.  Note that QualByDepth requires sequencing
  * reads associated with the samples with polymorphic genotypes.