diff --git a/openssl-sys/src/lib.rs b/openssl-sys/src/lib.rs
index 53e06c3a52fbe119e93ea0160ffab7a8f28daf34..598a3c595734cdec5c3e4b46eac9bd6644ccaac3 100644
--- a/openssl-sys/src/lib.rs
+++ b/openssl-sys/src/lib.rs
@@ -433,6 +433,7 @@ extern "C" {
     pub fn EVP_PKEY_assign(pkey: *mut EVP_PKEY, typ: c_int, key: *const c_void) -> c_int;
     pub fn EVP_PKEY_get1_RSA(k: *mut EVP_PKEY) -> *mut RSA;
     pub fn EVP_PKEY_set1_RSA(k: *mut EVP_PKEY, r: *mut RSA) -> c_int;
+    pub fn EVP_PKEY_cmp(a: *const EVP_PKEY, b: *const EVP_PKEY) -> c_int;
 
     pub fn HMAC_CTX_init(ctx: *mut HMAC_CTX);
     pub fn HMAC_CTX_cleanup(ctx: *mut HMAC_CTX);
diff --git a/openssl/src/crypto/pkey.rs b/openssl/src/crypto/pkey.rs
index 33433b0c6f744215afbf6b33949fc931ad715ae3..e93757a1cdee58413d048f94428b96b82df7e4f3 100644
--- a/openssl/src/crypto/pkey.rs
+++ b/openssl/src/crypto/pkey.rs
@@ -352,6 +352,12 @@ impl PKey {
     }
 }
 
+impl PartialEq<PKey> for PKey {
+    fn eq(&self, other: &PKey) -> bool {
+        unsafe { ffi::EVP_PKEY_cmp(self.evp, other.evp) == 1 }
+    }
+}
+
 impl Drop for PKey {
     fn drop(&mut self) {
         unsafe {
@@ -373,6 +379,7 @@ mod tests {
         k0.gen(512);
         k1.load_pub(&k0.save_pub());
         assert_eq!(k0.save_pub(), k1.save_pub());
+        assert!(k0 == k1);
         assert_eq!(k0.size(), k1.size());
         assert!(k0.can(super::Role::Encrypt));
         assert!(k0.can(super::Role::Decrypt));
@@ -391,6 +398,7 @@ mod tests {
         k0.gen(512);
         k1.load_priv(&k0.save_priv());
         assert_eq!(k0.save_priv(), k1.save_priv());
+        assert!(k0 == k1);
         assert_eq!(k0.size(), k1.size());
         assert!(k0.can(super::Role::Encrypt));
         assert!(k0.can(super::Role::Decrypt));
@@ -461,4 +469,26 @@ mod tests {
         assert!(k1.verify_with_hash(&msg, &sig, MD5));
         assert!(!k1.verify_with_hash(&msg, &sig, SHA1));
     }
+
+    #[test]
+    fn test_eq() {
+        let mut k0 = super::PKey::new();
+        let mut p0 = super::PKey::new();
+        let mut k1 = super::PKey::new();
+        let mut p1 = super::PKey::new();
+        k0.gen(512);
+        k1.gen(512);
+        p0.load_pub(&k0.save_pub());
+        p1.load_pub(&k1.save_pub());
+
+        assert!(k0 == k0);
+        assert!(k1 == k1);
+        assert!(p0 == p0);
+        assert!(p1 == p1);
+
+        assert!(k0 != k1);
+        assert!(p0 != p1);
+        assert!(k0 != p1);
+        assert!(p0 != k1);
+    }
 }