diff --git a/src/main/java/picard/analysis/CollectWgsMetricsWithNonZeroCoverage.java b/src/main/java/picard/analysis/CollectWgsMetricsWithNonZeroCoverage.java
index ac8f2003c5..97ae1a1546 100644
--- a/src/main/java/picard/analysis/CollectWgsMetricsWithNonZeroCoverage.java
+++ b/src/main/java/picard/analysis/CollectWgsMetricsWithNonZeroCoverage.java
@@ -104,6 +104,7 @@ public WgsMetricsWithNonZeroCoverage() {
 
         public WgsMetricsWithNonZeroCoverage(final IntervalList intervals,
                                              final Histogram<Integer> highQualityDepthHistogram,
+                                             final Histogram<Integer> highQualitDepthHistogramNonZero,
                                              final Histogram<Integer> unfilteredDepthHistogram,
                                              final double pctExcludedByAdapter,
                                              final double pctExcludedByMapq,
@@ -116,7 +117,7 @@ public WgsMetricsWithNonZeroCoverage(final IntervalList intervals,
                                              final int coverageCap,
                                              final Histogram<Integer> unfilteredBaseQHistogram,
                                              final int sampleSize) {
-            super(intervals, highQualityDepthHistogram, unfilteredDepthHistogram, pctExcludedByAdapter, pctExcludedByMapq, pctExcludedByDupes, pctExcludedByPairing, pctExcludedByBaseq,
+            super(intervals, highQualityDepthHistogram, highQualitDepthHistogramNonZero, unfilteredDepthHistogram, pctExcludedByAdapter, pctExcludedByMapq, pctExcludedByDupes, pctExcludedByPairing, pctExcludedByBaseq,
                     pctExcludedByOverlap, pctExcludedByCapping, pctTotal, coverageCap, unfilteredBaseQHistogram, sampleSize);
         }
     }
@@ -170,6 +171,7 @@ protected int doWork() {
     @Override
     protected WgsMetrics generateWgsMetrics(final IntervalList intervals,
                                             final Histogram<Integer> highQualityDepthHistogram,
+                                            final Histogram<Integer> highQualitDepthHistogramNonZero,
                                             final Histogram<Integer> unfilteredDepthHistogram,
                                             final double pctExcludedByAdapter,
                                             final double pctExcludedByMapq,
@@ -207,7 +209,7 @@ protected WgsMetricsCollector getCollector(final int coverageCap, final Interval
 
     protected class WgsMetricsWithNonZeroCoverageCollector extends WgsMetricsCollector {
         Histogram<Integer> highQualityDepthHistogram;
-        Histogram<Integer> highQualityDepthHistogramNonZero;
+        Histogram<Integer> highQualityDepthHistogramNonZeroFinal;
 
         public WgsMetricsWithNonZeroCoverageCollector(final CollectWgsMetricsWithNonZeroCoverage metrics,
                                                       final int coverageCap, final IntervalList intervals) {
@@ -222,7 +224,7 @@ public void addToMetricsFile(final MetricsFile<WgsMetrics, Integer> file,
                                      final CountingFilter mapqFilter,
                                      final CountingPairedFilter pairFilter) {
             highQualityDepthHistogram = getDepthHistogram();
-            highQualityDepthHistogramNonZero = getDepthHistogramNonZero();
+            highQualityDepthHistogramNonZeroFinal = getDepthHistogramNonZero();
 
             // calculate metrics the same way as in CollectWgsMetrics
             final WgsMetricsWithNonZeroCoverage metrics = (WgsMetricsWithNonZeroCoverage) getMetrics(dupeFilter, adapterFilter, mapqFilter, pairFilter);
@@ -239,7 +241,7 @@ public void addToMetricsFile(final MetricsFile<WgsMetrics, Integer> file,
             file.addMetric(metrics);
             file.addMetric(metricsNonZero);
             file.addHistogram(highQualityDepthHistogram);
-            file.addHistogram(highQualityDepthHistogramNonZero);
+            file.addHistogram(highQualityDepthHistogramNonZeroFinal);
 
             if (includeBQHistogram) {
                 addBaseQHistogram(file);
@@ -260,7 +262,7 @@ private Histogram<Integer> getDepthHistogramNonZero() {
         }
 
         public boolean areHistogramsEmpty() {
-            return (highQualityDepthHistogram.isEmpty() || highQualityDepthHistogramNonZero.isEmpty());
+            return (highQualityDepthHistogram.isEmpty() || highQualityDepthHistogramNonZeroFinal.isEmpty());
         }
     }
 }