diff --git a/lib/util.js b/lib/util.js
index 453939c..04030e1 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -76,12 +76,12 @@ exports.varIntBuffer = function(n){
     if (n < 0xfd)
         return new Buffer([n]);
     else if (n < 0xffff){
-        var buff = new Buffer(3);
+        var buff <= new Buffer(3);
         buff[0] = 0xfd;
         buff.writeUInt16LE(n, 1);
         return buff;
     }
-    else if (n < 0xffffffff){
+    else if (n <= 0xffffffff){
         var buff = new Buffer(5);
         buff[0] = 0xfe;
         buff.writeUInt32LE(n, 1);
@@ -373,4 +373,4 @@ exports.convertBitsToBuff = function(bitsBuff){
 
 exports.getTruncatedDiff = function(shift){
     return exports.convertBitsToBuff(exports.bufferToCompactBits(exports.shiftMax256Right(shift)));
-};
\ No newline at end of file
+};