diff --git a/sec-common/src/main/java/com/imdroid/common/util/ByteUtil.java b/sec-common/src/main/java/com/imdroid/common/util/ByteUtil.java
index 1ee7b294..3afb70d8 100644
--- a/sec-common/src/main/java/com/imdroid/common/util/ByteUtil.java
+++ b/sec-common/src/main/java/com/imdroid/common/util/ByteUtil.java
@@ -337,7 +337,8 @@ public class ByteUtil {
      */
     public static String bytesToHexString(byte[] b) {
         StringBuffer buffer = new StringBuffer();
-        for (int i = 0; i < b.length; ++i) {
+        int i = 0;
+        for (i = 0; i < b.length; ++i) {
             buffer.append(byteToHexString(b[i]));
         }
         return buffer.toString();