1 files changed, 4 insertions, 0 deletions
diff --git a/openssl/src/ssl/mod.rs b/openssl/src/ssl/mod.rs
index 0763c207..aa3d5280 100644
--- a/openssl/src/ssl/mod.rs
+++ b/openssl/src/ssl/mod.rs
@@ -13,6 +13,10 @@ use std::ptr;
 use std::sync::{Once, ONCE_INIT, Arc};
 use std::ops::{Deref, DerefMut};
 use std::cmp;
+#[cfg(feature = "npn")]
+use libc::{c_uchar, c_uint};
+#[cfg(feature = "npn")]
+use std::slice;
 
 use bio::{MemBio};
 use ffi;