1
2---
3 src/connection.rs | 6 +++---
4 1 file changed, 3 insertions(+), 3 deletions(-)
5
6diff --git b/src/connection.rs a/src/connection.rs
7index 53706d60..84cb8fc0 100755
8--- b/src/connection.rs
9+++ a/src/connection.rs
10@@ -99,9 +99,9 @@ impl InnerConnection {
11         hello_buf[0..BENCHMARK_MAGIC_NUMBER.len()]
12             .copy_from_slice(BENCHMARK_MAGIC_NUMBER.as_bytes());
13         let mut i = BENCHMARK_MAGIC_NUMBER.len();
14-        hello_buf[i] = env!("CARGO_PKG_VERSION_MAJOR").parse().unwrap();
15-        hello_buf[i + 1] = env!("CARGO_PKG_VERSION_MINOR").parse().unwrap();
16-        hello_buf[i + 2] = env!("CARGO_PKG_VERSION_PATCH").parse().unwrap();
17+        hello_buf[i] = 0;
18+        hello_buf[i + 1] = 0;
19+        hello_buf[i + 2] = 0;
20         i += 3;
21         hello_buf[i..i + 2].clone_from_slice(&PROTOCOL_VERSION.to_be_bytes());
22         i += 2;
23