diff --git a/java/src/org/broadinstitute/sting/playground/gatk/walkers/SomaticMutationWalker.java b/java/src/org/broadinstitute/sting/playground/gatk/walkers/SomaticMutationWalker.java
index 00f14ce5c..4ee066227 100644
--- a/java/src/org/broadinstitute/sting/playground/gatk/walkers/SomaticMutationWalker.java
+++ b/java/src/org/broadinstitute/sting/playground/gatk/walkers/SomaticMutationWalker.java
@@ -51,10 +51,10 @@ public class SomaticMutationWalker extends LocusWalker<Integer, Integer> {
         }
     }
 
-    @Argument(fullName = "tumor_sample_name", shortName = "s1", required = true)
+    @Argument(fullName = "tumor_sample_name", shortName = "s1", required = true, doc="Name of the tumor sample")
     public String tumorSampleName;
 
-    @Argument(fullName = "normal_sample_name", shortName = "s2", required = true)
+    @Argument(fullName = "normal_sample_name", shortName = "s2", required = true, doc="Name of the normal sample")
     public String normalSampleName;
 
     public void initialize() {