diff --git a/java/src/org/broadinstitute/sting/gatk/GenomeAnalysisEngine.java b/java/src/org/broadinstitute/sting/gatk/GenomeAnalysisEngine.java
index 9e6694b65..7c0d5e889 100755
--- a/java/src/org/broadinstitute/sting/gatk/GenomeAnalysisEngine.java
+++ b/java/src/org/broadinstitute/sting/gatk/GenomeAnalysisEngine.java
@@ -907,7 +907,8 @@ public class GenomeAnalysisEngine {
                 getWalkerBAQApplicationTime() == BAQ.ApplicationTime.ON_INPUT ? argCollection.BAQMode : BAQ.CalculationMode.OFF,
                 getWalkerBAQQualityMode(),
                 refReader,
-                argCollection.defaultBaseQualities,argCollection.enableLowMemorySharding);
+                argCollection.defaultBaseQualities,
+                !argCollection.disableLowMemorySharding);
         return dataSource;
     }
 
diff --git a/java/src/org/broadinstitute/sting/gatk/arguments/GATKArgumentCollection.java b/java/src/org/broadinstitute/sting/gatk/arguments/GATKArgumentCollection.java
index 4e81b8294..be5d725be 100755
--- a/java/src/org/broadinstitute/sting/gatk/arguments/GATKArgumentCollection.java
+++ b/java/src/org/broadinstitute/sting/gatk/arguments/GATKArgumentCollection.java
@@ -243,8 +243,8 @@ public class GATKArgumentCollection {
     public boolean allowIntervalsWithUnindexedBAM = false;
 
     @Element(required = false)
-    @Argument(fullName="enable_experimental_low_memory_sharding",doc="Enable experimental low-memory sharding functionality.  Use at your own risk.",required=false)
-    public boolean enableLowMemorySharding = false;
+    @Argument(fullName="disable_experimental_low_memory_sharding",doc="Enable experimental low-memory sharding functionality.  Use at your own risk.",required=false)
+    public boolean disableLowMemorySharding = false;
 
     // --------------------------------------------------------------------------------------------------------------
     //
@@ -432,7 +432,7 @@ public class GATKArgumentCollection {
         if (allowIntervalsWithUnindexedBAM != other.allowIntervalsWithUnindexedBAM)
             return false;
 
-        if (enableLowMemorySharding != other.enableLowMemorySharding)
+        if (disableLowMemorySharding != other.disableLowMemorySharding)
             return false;
 
         return true;
diff --git a/java/src/org/broadinstitute/sting/gatk/datasources/reads/LowMemoryIntervalSharder.java b/java/src/org/broadinstitute/sting/gatk/datasources/reads/LowMemoryIntervalSharder.java
index 4d953dc16..ba6321121 100644
--- a/java/src/org/broadinstitute/sting/gatk/datasources/reads/LowMemoryIntervalSharder.java
+++ b/java/src/org/broadinstitute/sting/gatk/datasources/reads/LowMemoryIntervalSharder.java
@@ -45,7 +45,6 @@ public class LowMemoryIntervalSharder implements Iterator<FilePointer> {
     private final GenomeLocParser parser;
 
     public LowMemoryIntervalSharder(final SAMDataSource dataSource, final GenomeLocSortedSet loci) {
-        System.out.println("Low memory interval sharding enabled");
         wrappedIterator = new PeekableIterator<FilePointer>(new BAMScheduler(dataSource,loci));
         parser = loci.getGenomeLocParser();
     }