diff --git a/wpilibj/src/athena/java/edu/wpi/first/wpilibj/SerialPort.java b/wpilibj/src/athena/java/edu/wpi/first/wpilibj/SerialPort.java
index 4439f5ffb8..605fd4eab7 100644
--- a/wpilibj/src/athena/java/edu/wpi/first/wpilibj/SerialPort.java
+++ b/wpilibj/src/athena/java/edu/wpi/first/wpilibj/SerialPort.java
@@ -321,7 +321,7 @@ public class SerialPort {
   public String readString(int count) {
     byte[] out = read(count);
     try {
-      return new String(out, 0, count, "US-ASCII");
+      return new String(out, 0, out.length, "US-ASCII");
     } catch (UnsupportedEncodingException ex) {
       ex.printStackTrace();
       return new String();