diff --git a/openssl-sys/src/pem.rs b/openssl-sys/src/pem.rs
index 7dc37b59..c7d79773 100644
--- a/openssl-sys/src/pem.rs
+++ b/openssl-sys/src/pem.rs
@@ -141,6 +141,9 @@ extern "C" {
         bp: *mut BIO,
         x: *mut *mut PKCS8_PRIV_KEY_INFO,
     ) -> *mut PKCS8_PRIV_KEY_INFO;
+    pub fn PKCS8_PRIV_KEY_INFO_free(
+        p8inf: *mut PKCS8_PRIV_KEY_INFO,
+    );
 
     pub fn PEM_read_bio_PKCS7(
         bio: *mut BIO,
diff --git a/openssl/src/pkey.rs b/openssl/src/pkey.rs
index bcbfc385..b5a12bf7 100644
--- a/openssl/src/pkey.rs
+++ b/openssl/src/pkey.rs
@@ -538,8 +538,10 @@ impl PKey<Private> {
                 bio.as_ptr(),
                 ptr::null_mut(),
             ))?;
-            cvt_p(ffi::EVP_PKCS82PKEY(p8inf))
-                .map(|p| PKey::from_ptr(p))
+            let res = cvt_p(ffi::EVP_PKCS82PKEY(p8inf))
+                .map(|p| PKey::from_ptr(p));
+            ffi::PKCS8_PRIV_KEY_INFO_free(p8inf);
+            res
         }
     }