diff --git a/h2o-core/src/main/java/water/util/ArrayUtils.java b/h2o-core/src/main/java/water/util/ArrayUtils.java
index 024ca3561ba0..dea7b10410f2 100644
--- a/h2o-core/src/main/java/water/util/ArrayUtils.java
+++ b/h2o-core/src/main/java/water/util/ArrayUtils.java
@@ -563,7 +563,7 @@ public static void matrixMult(double[][] result, double[][] op1, double[][] op2)
   
   public static void matrixVectorMult(double[] result, double[][] matrix, double[] vector) {
     if (result == null)
-      throw new IllegalArgumentException("result should be a double[] array already allocated.");
+      throw new IllegalArgumentException("Result should be a double[] array already allocated.");
     int numRow = matrix.length;
     int numCol = matrix[0].length;
     for (int rInd = 0; rInd < numRow; rInd++)