diff --git a/lib/writer.js b/lib/writer.js
index d31f26fb..a6d88f38 100644
--- a/lib/writer.js
+++ b/lib/writer.js
@@ -63,9 +63,9 @@ p.addCString = function(string) {
   return this;
 };
 
-p.addChar = function(char) {
+p.addChar = function(c) {
   this._ensure(1);
-  writeString(this.buffer, char, this.offset, 1);
+  writeString(this.buffer, c, this.offset, 1);
   this.offset++;
   return this;
 };