diff --git a/openssl/src/hash.rs b/openssl/src/hash.rs
index 01d7097b0..f2f2698f3 100644
--- a/openssl/src/hash.rs
+++ b/openssl/src/hash.rs
@@ -70,6 +70,7 @@ impl MessageDigest {
     ///
     /// [`EVP_get_digestbynid`]: https://www.openssl.org/docs/manmaster/crypto/EVP_DigestInit.html
     pub fn from_nid(type_: Nid) -> Option<MessageDigest> {
+        ffi::init();
         unsafe {
             let ptr = ffi::EVP_get_digestbynid(type_.as_raw());
             if ptr.is_null() {
diff --git a/openssl/src/md.rs b/openssl/src/md.rs
index 08e4aacf3..a9df31140 100644
--- a/openssl/src/md.rs
+++ b/openssl/src/md.rs
@@ -80,6 +80,7 @@ impl Md {
     /// Returns the `Md` corresponding to an [`Nid`].
     #[corresponds(EVP_get_digestbynid)]
     pub fn from_nid(type_: Nid) -> Option<&'static MdRef> {
+        ffi::init();
         unsafe {
             let ptr = ffi::EVP_get_digestbynid(type_.as_raw());
             if ptr.is_null() {
@@ -100,6 +101,7 @@ impl Md {
         algorithm: &str,
         properties: Option<&str>,
     ) -> Result<Self, ErrorStack> {
+        ffi::init();
         let algorithm = CString::new(algorithm).unwrap();
         let properties = properties.map(|s| CString::new(s).unwrap());