diff --git a/openssl/src/cipher.rs b/openssl/src/cipher.rs
index 744ff7343250d36cf4d993f9a80543b77f77c80c..dfed73b37d4e835060f9dbc34e44ab5dee6f55fb 100644
--- a/openssl/src/cipher.rs
+++ b/openssl/src/cipher.rs
@@ -8,6 +8,8 @@ cfg_if! {
     if #[cfg(any(ossl110, libressl273))] {
         use ffi::{EVP_CIPHER_block_size, EVP_CIPHER_iv_length, EVP_CIPHER_key_length};
     } else {
+        use libc::c_int;
+
         #[allow(bad_style)]
         pub unsafe fn EVP_CIPHER_iv_length(ptr: *const ffi::EVP_CIPHER) -> c_int {
             (*ptr).iv_len
diff --git a/openssl/src/symm.rs b/openssl/src/symm.rs
index 68a42c291011ffff39116d0a5cac89a25a857265..c5987e4701b3836904b3c69dc4a0df6b4ca8e802 100644
--- a/openssl/src/symm.rs
+++ b/openssl/src/symm.rs
@@ -735,6 +735,8 @@ cfg_if! {
     if #[cfg(any(ossl110, libressl273))] {
         use ffi::{EVP_CIPHER_block_size, EVP_CIPHER_iv_length, EVP_CIPHER_key_length};
     } else {
+        use libc::c_int;
+
         #[allow(bad_style)]
         pub unsafe fn EVP_CIPHER_iv_length(ptr: *const ffi::EVP_CIPHER) -> c_int {
             (*ptr).iv_len