diff --git a/src/main/java/com/esaulpaugh/headlong/cli/Main.java b/src/main/java/com/esaulpaugh/headlong/cli/Main.java
index b64a4bc..fc25a77 100644
--- a/src/main/java/com/esaulpaugh/headlong/cli/Main.java
+++ b/src/main/java/com/esaulpaugh/headlong/cli/Main.java
@@ -278,8 +278,7 @@ private static int checkTypeBits(int typeBits) {
 
     private static String trimmed(StringBuilder sb, boolean trim) {
         if(trim) {
-            final int len = sb.length();
-            sb.replace(len - 1, len, "");
+            sb.setLength(sb.length() - 1);
         }
         return sb.toString();
     }