diff --git a/public/java/src/org/broadinstitute/sting/commandline/IntervalBinding.java b/public/java/src/org/broadinstitute/sting/commandline/IntervalBinding.java
index 82c7b20b6..9e2c9a818 100644
--- a/public/java/src/org/broadinstitute/sting/commandline/IntervalBinding.java
+++ b/public/java/src/org/broadinstitute/sting/commandline/IntervalBinding.java
@@ -108,4 +108,8 @@ public final class IntervalBinding<T extends Feature> {
 
         return intervals;
     }
+
+    public String toString() {
+        return getSource();
+    }
 }