diff --git a/src/main/java/gov/usgs/earthquake/nshmp/www/gmm/GmmCalc.java b/src/main/java/gov/usgs/earthquake/nshmp/www/gmm/GmmCalc.java
index 405dd2042d9af5e18ac45f39af99038cdd2739d3..012637b33548c328eb2bc97b6581489b17086a30 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/www/gmm/GmmCalc.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/www/gmm/GmmCalc.java
@@ -29,7 +29,6 @@ import gov.usgs.earthquake.nshmp.tree.LogicTree;
 import gov.usgs.earthquake.nshmp.www.gmm.GmmService.Distance;
 import gov.usgs.earthquake.nshmp.www.gmm.GmmService.Magnitude;
 import gov.usgs.earthquake.nshmp.www.gmm.GmmService.Request;
-
 import jakarta.inject.Singleton;
 
 /*
@@ -91,7 +90,7 @@ class GmmCalc {
         .map(Branch::id)
         .collect(Collectors.toList());
 
-    double[] xs = xValues.stream().mapToDouble(Double::valueOf).toArray();
+    double[] xs = xValues.stream().mapToDouble(Double::doubleValue).toArray();
     double[] μs = new double[xValues.size()];
     double[] σs = new double[xValues.size()];