diff --git a/classpath/java/util/ArrayList.java b/classpath/java/util/ArrayList.java
index fa0813805c..abb5ea28cc 100644
--- a/classpath/java/util/ArrayList.java
+++ b/classpath/java/util/ArrayList.java
@@ -70,7 +70,7 @@ public class ArrayList<T> implements List<T> {
   public void add(int index, T element) {
     size = Math.max(size+1, index+1);
     grow();
-    System.arraycopy(array, index, array, index+1, size-index);
+    System.arraycopy(array, index, array, index+1, size-index-1);
     array[index] = element;
   }
 
diff --git a/src/builtin.cpp b/src/builtin.cpp
index 44209e5f4c..a9a84e8fdf 100644
--- a/src/builtin.cpp
+++ b/src/builtin.cpp
@@ -446,7 +446,7 @@ Java_java_lang_System_arraycopy
         {
           uint8_t* sbody = &cast<uint8_t>(s, 2 * BytesPerWord);
           uint8_t* dbody = &cast<uint8_t>(d, 2 * BytesPerWord);
-          if (src == dst) {
+          if (s == d) {
             memmove(dbody + (dstOffset * elementSize),
                     sbody + (srcOffset * elementSize),
                     length * elementSize);