diff --git a/lib/buffer.js b/lib/buffer.js
index 377ee61728..b6dfc526cc 100644
--- a/lib/buffer.js
+++ b/lib/buffer.js
@@ -409,7 +409,7 @@ Buffer.prototype.readUInt16BE = function(offset, noAssert) {
 };
 
 
-function readUInt32(buffer, offset, isBigEndian, noAssert) {
+function readUInt32(buffer, offset, isBigEndian) {
   var val = 0;
   if (isBigEndian) {
     val = buffer[offset + 1] << 16;
@@ -430,7 +430,7 @@ Buffer.prototype.readUInt32LE = function(offset, noAssert) {
   offset = ~~offset;
   if (!noAssert)
     checkOffset(offset, 4, this.length);
-  return readUInt32(this, offset, false, noAssert);
+  return readUInt32(this, offset, false);
 };
 
 
@@ -438,7 +438,7 @@ Buffer.prototype.readUInt32BE = function(offset, noAssert) {
   offset = ~~offset;
   if (!noAssert)
     checkOffset(offset, 4, this.length);
-  return readUInt32(this, offset, true, noAssert);
+  return readUInt32(this, offset, true);
 };