diff --git a/openssl/src/ssl/mod.rs b/openssl/src/ssl/mod.rs
index 68d411c7..4f5039de 100644
--- a/openssl/src/ssl/mod.rs
+++ b/openssl/src/ssl/mod.rs
@@ -567,7 +567,7 @@ impl SslContextBuilder {
         unsafe {
             cvt(ffi::SSL_CTX_use_certificate_file(self.as_ptr(),
                                                   file.as_ptr() as *const _,
-                                                  file_type as c_int))
+                                                  file_type.as_raw()))
                 .map(|_| ())
         }
     }
@@ -607,7 +607,7 @@ impl SslContextBuilder {
         unsafe {
             cvt(ffi::SSL_CTX_use_PrivateKey_file(self.as_ptr(),
                                                  file.as_ptr() as *const _,
-                                                 file_type as c_int))
+                                                 file_type.as_raw()))
                 .map(|_| ())
         }
     }
diff --git a/openssl/src/ssl/tests/mod.rs b/openssl/src/ssl/tests/mod.rs
index 13b3a8a7..2a27dff4 100644
--- a/openssl/src/ssl/tests/mod.rs
+++ b/openssl/src/ssl/tests/mod.rs
@@ -20,9 +20,7 @@ use ssl::SSL_VERIFY_PEER;
 use ssl::{SslMethod, HandshakeError};
 use ssl::{SslContext, SslStream, Ssl, ShutdownResult, SslConnectorBuilder, SslAcceptorBuilder,
           Error};
-use x509::X509StoreContext;
-use x509::X509FileType;
-use x509::X509;
+use x509::{X509StoreContext, X509, X509_FILETYPE_PEM};
 #[cfg(any(all(feature = "v102", ossl102), all(feature = "v110", ossl110)))]
 use x509::verify::X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS;
 use pkey::PKey;
@@ -369,8 +367,8 @@ fn test_write_hits_stream() {
 
     let mut ctx = SslContext::builder(SslMethod::tls()).unwrap();
     ctx.set_verify(SSL_VERIFY_PEER);
-    ctx.set_certificate_file(&Path::new("test/cert.pem"), X509FileType::PEM).unwrap();
-    ctx.set_private_key_file(&Path::new("test/key.pem"), X509FileType::PEM).unwrap();
+    ctx.set_certificate_file(&Path::new("test/cert.pem"), X509_FILETYPE_PEM).unwrap();
+    ctx.set_private_key_file(&Path::new("test/key.pem"), X509_FILETYPE_PEM).unwrap();
     let stream = listener.accept().unwrap().0;
     let mut stream = Ssl::new(&ctx.build()).unwrap().accept(stream).unwrap();
 
@@ -634,9 +632,9 @@ fn test_npn_server_advertise_multiple() {
         let mut ctx = SslContext::builder(SslMethod::tls()).unwrap();
         ctx.set_verify(SSL_VERIFY_PEER);
         ctx.set_npn_protocols(&[b"http/1.1", b"spdy/3.1"]).unwrap();
-        assert!(ctx.set_certificate_file(&Path::new("test/cert.pem"), X509FileType::PEM)
+        assert!(ctx.set_certificate_file(&Path::new("test/cert.pem"), X509_FILETYPE_PEM)
                    .is_ok());
-        ctx.set_private_key_file(&Path::new("test/key.pem"), X509FileType::PEM)
+        ctx.set_private_key_file(&Path::new("test/key.pem"), X509_FILETYPE_PEM)
             .unwrap();
         ctx.build()
     };
@@ -675,9 +673,9 @@ fn test_alpn_server_advertise_multiple() {
         let mut ctx = SslContext::builder(SslMethod::tls()).unwrap();
         ctx.set_verify(SSL_VERIFY_PEER);
         ctx.set_alpn_protocols(&[b"http/1.1", b"spdy/3.1"]).unwrap();
-        assert!(ctx.set_certificate_file(&Path::new("test/cert.pem"), X509FileType::PEM)
+        assert!(ctx.set_certificate_file(&Path::new("test/cert.pem"), X509_FILETYPE_PEM)
                    .is_ok());
-        ctx.set_private_key_file(&Path::new("test/key.pem"), X509FileType::PEM)
+        ctx.set_private_key_file(&Path::new("test/key.pem"), X509_FILETYPE_PEM)
             .unwrap();
         ctx.build()
     };
@@ -716,9 +714,9 @@ fn test_alpn_server_select_none() {
         let mut ctx = SslContext::builder(SslMethod::tls()).unwrap();
         ctx.set_verify(SSL_VERIFY_PEER);
         ctx.set_alpn_protocols(&[b"http/1.1", b"spdy/3.1"]).unwrap();
-        assert!(ctx.set_certificate_file(&Path::new("test/cert.pem"), X509FileType::PEM)
+        assert!(ctx.set_certificate_file(&Path::new("test/cert.pem"), X509_FILETYPE_PEM)
                    .is_ok());
-        ctx.set_private_key_file(&Path::new("test/key.pem"), X509FileType::PEM)
+        ctx.set_private_key_file(&Path::new("test/key.pem"), X509_FILETYPE_PEM)
             .unwrap();
         ctx.build()
     };
@@ -751,9 +749,9 @@ fn test_alpn_server_select_none() {
         let mut ctx = SslContext::builder(SslMethod::tls()).unwrap();
         ctx.set_verify(SSL_VERIFY_PEER);
         ctx.set_alpn_protocols(&[b"http/1.1", b"spdy/3.1"]).unwrap();
-        assert!(ctx.set_certificate_file(&Path::new("test/cert.pem"), X509FileType::PEM)
+        assert!(ctx.set_certificate_file(&Path::new("test/cert.pem"), X509_FILETYPE_PEM)
                    .is_ok());
-        ctx.set_private_key_file(&Path::new("test/key.pem"), X509FileType::PEM)
+        ctx.set_private_key_file(&Path::new("test/key.pem"), X509_FILETYPE_PEM)
             .unwrap();
         ctx.build()
     };
@@ -1162,8 +1160,8 @@ fn shutdown() {
     thread::spawn(move || {
         let stream = listener.accept().unwrap().0;
         let mut ctx = SslContext::builder(SslMethod::tls()).unwrap();
-        ctx.set_certificate_file(&Path::new("test/cert.pem"), X509FileType::PEM).unwrap();
-        ctx.set_private_key_file(&Path::new("test/key.pem"), X509FileType::PEM).unwrap();
+        ctx.set_certificate_file(&Path::new("test/cert.pem"), X509_FILETYPE_PEM).unwrap();
+        ctx.set_private_key_file(&Path::new("test/key.pem"), X509_FILETYPE_PEM).unwrap();
         let ssl = Ssl::new(&ctx.build()).unwrap();
         let mut stream = ssl.accept(stream).unwrap();
 
diff --git a/openssl/src/x509/mod.rs b/openssl/src/x509/mod.rs
index 02bdcb01..bffb193c 100644
--- a/openssl/src/x509/mod.rs
+++ b/openssl/src/x509/mod.rs
@@ -39,14 +39,18 @@ pub mod extension;
 #[cfg(test)]
 mod tests;
 
-#[derive(Copy, Clone)]
-#[repr(i32)]
-pub enum X509FileType {
-    PEM = ffi::X509_FILETYPE_PEM,
-    ASN1 = ffi::X509_FILETYPE_ASN1,
-    Default = ffi::X509_FILETYPE_DEFAULT,
+pub struct X509FileType(c_int);
+
+impl X509FileType {
+    pub fn as_raw(&self) -> c_int {
+        self.0
+    }
 }
 
+pub const X509_FILETYPE_PEM: X509FileType = X509FileType(ffi::X509_FILETYPE_PEM);
+pub const X509_FILETYPE_ASN1: X509FileType = X509FileType(ffi::X509_FILETYPE_ASN1);
+pub const X509_FILETYPE_DEFAULT: X509FileType = X509FileType(ffi::X509_FILETYPE_DEFAULT);
+
 type_!(X509StoreContext, ffi::X509_STORE_CTX, ffi::X509_STORE_CTX_free);
 
 impl Ref<X509StoreContext> {