diff --git a/hoot-core/src/main/cpp/hoot/core/scoring/GraphComparator.cpp b/hoot-core/src/main/cpp/hoot/core/scoring/GraphComparator.cpp
index 5a39943..7e61e20 100644
--- a/hoot-core/src/main/cpp/hoot/core/scoring/GraphComparator.cpp
+++ b/hoot-core/src/main/cpp/hoot/core/scoring/GraphComparator.cpp
@@ -22,7 +22,7 @@
* This will properly maintain the copyright information. DigitalGlobe
* copyrights will be updated automatically.
*
- * @copyright Copyright (C) 2015, 2016, 2017, 2018, 2019 DigitalGlobe (http://www.digitalglobe.com/)
+ * @copyright Copyright (C) 2015, 2016, 2017, 2018, 2019, 2020 DigitalGlobe (http://www.digitalglobe.com/)
*/
#include "GraphComparator.h"
@@ -73,7 +73,7 @@ GraphComparator::GraphComparator(OsmMapPtr map1, OsmMapPtr map2) :
_ci(-1.0),
_s(-1.0),
_debugImages(false),
- _maxThreads(10)
+ _maxThreads(1)
{
_init();
}