diff --git a/public/java/src/org/broadinstitute/sting/gatk/walkers/varianteval/evaluators/CountVariants.java b/public/java/src/org/broadinstitute/sting/gatk/walkers/varianteval/evaluators/CountVariants.java
index c740eb78c..e5e8dfaf5 100755
--- a/public/java/src/org/broadinstitute/sting/gatk/walkers/varianteval/evaluators/CountVariants.java
+++ b/public/java/src/org/broadinstitute/sting/gatk/walkers/varianteval/evaluators/CountVariants.java
@@ -182,6 +182,8 @@ public class CountVariants extends VariantEvaluator implements StandardEval {
                         nHomDerived++;
                     }
 
+                    break;
+                case MIXED:
                     break;
                 default:
                     throw new ReviewedStingException("BUG: Unexpected genotype type: " + g);