diff --git a/library/Support/EncodedString4.cs b/library/Support/EncodedString4.cs
index da52be28..71547808 100644
--- a/library/Support/EncodedString4.cs
+++ b/library/Support/EncodedString4.cs
@@ -47,7 +47,7 @@ namespace PkmnFoundations.Support
 
         public static String DecodeString(byte[] data)
         {
-            return DecodeString(data, 0, data.Length);
+            return DecodeString(data, 0, data.Length >> 1);
         }
 
         public static byte[] EncodeString(string str)
diff --git a/library/Support/EncodedString5.cs b/library/Support/EncodedString5.cs
index 8884a4be..0234a8fd 100644
--- a/library/Support/EncodedString5.cs
+++ b/library/Support/EncodedString5.cs
@@ -48,7 +48,7 @@ namespace PkmnFoundations.Support
 
         public static String DecodeString(byte[] data)
         {
-            return DecodeString(data, 0, data.Length);
+            return DecodeString(data, 0, data.Length >> 1);
         }
 
         public static byte[] EncodeString(string str)