diff --git a/source/python.js b/source/python.js
index 74f15d5a61..46f0f97651 100644
--- a/source/python.js
+++ b/source/python.js
@@ -2817,6 +2817,7 @@ python.Execution = class {
         this.registerType('sklearn.metrics._dist_metrics.EuclideanDistance32', class extends sklearn.metrics._dist_metrics.DistanceMetric32 {});
         this.registerType('sklearn.metrics._dist_metrics.EuclideanDistance64', class extends sklearn.metrics._dist_metrics.DistanceMetric64 {});
         this.registerType('sklearn.metrics._dist_metrics.ManhattanDistance', class extends sklearn.metrics._dist_metrics.DistanceMetric {});
+        this.registerType('sklearn.metrics._dist_metrics.ManhattanDistance64', class extends sklearn.metrics._dist_metrics.DistanceMetric64 {});
         this.registerType('sklearn.metrics._scorer._PassthroughScorer', class {});
         this.registerType('sklearn.metrics._scorer._PredictScorer', class {});
         this.registerType('sklearn.metrics.scorer._PredictScorer', class {});