diff --git a/lib/kurushima-jsrsa/rsa-sign.js b/lib/kurushima-jsrsa/rsa-sign.js
index 3f5b2d5..3e1473f 100644
--- a/lib/kurushima-jsrsa/rsa-sign.js
+++ b/lib/kurushima-jsrsa/rsa-sign.js
@@ -37,7 +37,7 @@ _RSASIGN_DIHEAD['sha256'] = "3031300d060960864801650304020105000420";
 //_RSASIGN_DIHEAD['sha512'] = "3051300d060960864801650304020305000440";
 var _RSASIGN_HASHHEXFUNC = [];
 //_RSASIGN_HASHHEXFUNC['sha1'] = sha1.hex;
-_RSASIGN_HASHHEXFUNC['sha256'] = function(i) sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(i));
+_RSASIGN_HASHHEXFUNC['sha256'] = function(i) { return sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(i)); }
 
 // ========================================================================
 // Signature Generation