diff --git a/dx/src/com/android/dx/merge/DexMerger.java b/dx/src/com/android/dx/merge/DexMerger.java
index 949c576..7c04776 100644
--- a/dx/src/com/android/dx/merge/DexMerger.java
+++ b/dx/src/com/android/dx/merge/DexMerger.java
@@ -1101,7 +1101,7 @@
 
         Dex[] dexes = new Dex[args.length - 1];
         for (int i = 1; i < args.length; i++) {
-            dexes[i - 1] = new Dex(new File(args[i]));
+            dexes[i] = new Dex(new File(args[i]));
         }
         Dex merged = new DexMerger(dexes, CollisionPolicy.KEEP_FIRST).merge();
         merged.writeTo(new File(args[0]));