diff --git a/modPrecompiled/src/org/aion/precompiled/util/HexConvert.java b/modPrecompiled/src/org/aion/precompiled/util/HexConvert.java
index 5c408674b1..94baa7e680 100644
--- a/modPrecompiled/src/org/aion/precompiled/util/HexConvert.java
+++ b/modPrecompiled/src/org/aion/precompiled/util/HexConvert.java
@@ -5,6 +5,9 @@ public class HexConvert {
     private static final byte[] ZERO_BYTE_ARRAY = new byte[] {0};
 
     public static String bytesToHexString(byte[] bytes) {
+        if (bytes == null) {
+            return null;
+        }
         char[] hexChars = new char[bytes.length * 2];
         for (int j = 0; j < bytes.length; j++) {
             int v = bytes[j] & 0xFF;