diff --git a/types/node-forge/index.d.ts b/types/node-forge/index.d.ts
index 2784d95fa3..f177f36d5c 100644
--- a/types/node-forge/index.d.ts
+++ b/types/node-forge/index.d.ts
@@ -43,7 +43,9 @@ declare module "node-forge" {
             privateKey: Key;
         }
 
+		function pemToDer(pem: PEM): util.ByteStringBuffer;
         function privateKeyToPem(key: Key, maxline?: number): PEM;
+		function privateKeyInfoToPem(key: Key, maxline?: number): PEM;
         function publicKeyToPem(key: Key, maxline?: number): PEM;
         function publicKeyFromPem(pem: PEM): Key;
         function privateKeyFromPem(pem: PEM): Key;
diff --git a/types/node-forge/node-forge-tests.ts b/types/node-forge/node-forge-tests.ts
index 29b8267714..a5487ed027 100644
--- a/types/node-forge/node-forge-tests.ts
+++ b/types/node-forge/node-forge-tests.ts
@@ -8,6 +8,8 @@ let x: string = forge.ssh.privateKeyToOpenSSH(key);
 let pemKey: forge.pki.PEM = publicKeyPem;
 let publicKeyRsa = forge.pki.publicKeyFromPem(pemKey);
 let privateKeyRsa = forge.pki.privateKeyFromPem(privateKeyPem);
+let privateKeyRsa2 = forge.pki.privateKeyInfoToPem(privateKeyPem);
+let byteBufferString = forge.pki.pemToDer(privateKeyRsa);
 let cert = forge.pki.createCertificate();
 
 {