diff --git a/vecxt/src/doublematrix.scala b/vecxt/src/doublematrix.scala
index b2db415..5d1147d 100644
--- a/vecxt/src/doublematrix.scala
+++ b/vecxt/src/doublematrix.scala
@@ -5,6 +5,10 @@ import vecxt.JvmDoubleMatrix.*
 import vecxt.arrays.*
 import vecxt.matrix.*
 
+// These are used in cross compilation.
+import vecxt.JsDoubleMatrix.*
+import vecxt.NativeDoubleMatrix.*
+
 import vecxt.matrixUtil.diag
 
 object DoubleMatrix:
diff --git a/vecxt/test/src/matrix.test.scala b/vecxt/test/src/matrix.test.scala
index 59fc283..bfab151 100644
--- a/vecxt/test/src/matrix.test.scala
+++ b/vecxt/test/src/matrix.test.scala
@@ -278,7 +278,6 @@ class MatrixExtensionSuite extends FunSuite:
 
   test("trace") {
     val mat = Matrix[Double](NArray(1.0, 2.0, 3.0, 4.0), (2, 2))
-    println(mat.printMat)
     assertEquals(mat.trace, 5.0)
   }