diff --git a/lib/x509.js b/lib/x509.js
index 25096c17..2877810c 100644
--- a/lib/x509.js
+++ b/lib/x509.js
@@ -700,7 +700,7 @@ var _readSignatureParameters = function(oid, obj, fillDefaults) {
 var _createSignatureDigest = function(options) {
   switch(oids[options.signatureOid]) {
     case 'sha1WithRSAEncryption':
-    // depreacted alias
+    // deprecated alias
     case 'sha1WithRSASignature':
       return forge.md.sha1.create();
     case 'md5WithRSAEncryption':
@@ -737,7 +737,7 @@ var _verifySignature = function(options) {
 
   switch(cert.signatureOid) {
     case oids.sha1WithRSAEncryption:
-    // depreacted alias
+    // deprecated alias
     case oids.sha1WithRSASignature:
       /* use PKCS#1 v1.5 padding scheme */
       break;