diff --git a/Core/src/org/sleuthkit/autopsy/datamodel/DataConversion.java b/Core/src/org/sleuthkit/autopsy/datamodel/DataConversion.java
index b4672bbb55..5c7ff971f5 100644
--- a/Core/src/org/sleuthkit/autopsy/datamodel/DataConversion.java
+++ b/Core/src/org/sleuthkit/autopsy/datamodel/DataConversion.java
@@ -102,10 +102,10 @@ public class DataConversion {
                 outputStringBuilder.append("  ");
 
                 // print the ascii columns
-                String ascii = new String(array, curOffset, lineLen);                
+                String ascii = new String(array, curOffset, lineLen, java.nio.charset.StandardCharsets.US_ASCII);                
                 for (int i = 0; i < 16; i++) {
                     char c = ' ';
-                    if (i < lineLen) {
+                    if (i < ascii.length()) {
                         c = ascii.charAt(i);
                         int dec = (int) c;