diff --git a/src/main/java/org/apache/commons/math3/util/ResizableDoubleArray.java b/src/main/java/org/apache/commons/math3/util/ResizableDoubleArray.java
index cce62d9de..00c3e433f 100644
--- a/src/main/java/org/apache/commons/math3/util/ResizableDoubleArray.java
+++ b/src/main/java/org/apache/commons/math3/util/ResizableDoubleArray.java
@@ -298,14 +298,10 @@ public class ResizableDoubleArray implements DoubleArray, Serializable {
      * @param value to be added to end of array
      */
     public synchronized void addElement(double value) {
-        numElements++;
-        if ((startIndex + numElements) > internalArray.length) {
+        if (internalArray.length <= startIndex + numElements) {
             expand();
         }
-        internalArray[startIndex + (numElements - 1)] = value;
-        if (shouldContract()) {
-            contract();
-        }
+        internalArray[startIndex + numElements++] = value;
     }
 
     /**
diff --git a/src/test/java/org/apache/commons/math3/util/ResizableDoubleArrayTest.java b/src/test/java/org/apache/commons/math3/util/ResizableDoubleArrayTest.java
index 972999458..fd85eb0b8 100644
--- a/src/test/java/org/apache/commons/math3/util/ResizableDoubleArrayTest.java
+++ b/src/test/java/org/apache/commons/math3/util/ResizableDoubleArrayTest.java
@@ -157,16 +157,16 @@ public class ResizableDoubleArrayTest extends DoubleArrayAbstractTest {
         da.addElement(2.0);
         da.addElement(4.0);
         da.addElement(6.0);
-        Assert.assertEquals(4, ((ResizableDoubleArray) da).getInternalLength());
+        Assert.assertEquals(16, ((ResizableDoubleArray) da).getInternalLength());
         Assert.assertEquals(3, da.getNumElements());
         da.setElement(3, 7.0);
-        Assert.assertEquals(4, ((ResizableDoubleArray) da).getInternalLength());
+        Assert.assertEquals(16, ((ResizableDoubleArray) da).getInternalLength());
         Assert.assertEquals(4, da.getNumElements());
         da.setElement(10, 10.0);
-        Assert.assertEquals(11, ((ResizableDoubleArray) da).getInternalLength());
+        Assert.assertEquals(16, ((ResizableDoubleArray) da).getInternalLength());
         Assert.assertEquals(11, da.getNumElements());
         da.setElement(9, 10.0);
-        Assert.assertEquals(11, ((ResizableDoubleArray) da).getInternalLength());
+        Assert.assertEquals(16, ((ResizableDoubleArray) da).getInternalLength());
         Assert.assertEquals(11, da.getNumElements());
 
         try {