diff --git a/src/endian.rs b/src/endian.rs
index 187638a..553b952 100644
--- a/src/endian.rs
+++ b/src/endian.rs
@@ -227,7 +227,7 @@ impl Converter for BigEndian
       // Strings start with the size of bytes to read as
       // a u64. So read that in and then we know how many
       // bytes make up the string.
-      byte_count = BigEndian::bytes_to_u64(&buffer[0..U64_BYTES]);
+      byte_count = BigEndian::bytes_to_u64(&buffer[0..U64_BYTES-1]);
 
       if byte_count > 0
       {