diff --git a/http_parser.h b/http_parser.h
index 3ba4c7e..843817b 100644
--- a/http_parser.h
+++ b/http_parser.h
@@ -76,7 +76,7 @@ typedef struct http_parser_settings http_parser_settings;
  * HEAD request which may contain 'Content-Length' or 'Transfer-Encoding:
  * chunked' headers that indicate the presence of a body.
  *
- * http_data_cb does not return data chunks. It will be call arbitrarally
+ * http_data_cb does not return data chunks. It will be called arbitrarily
  * many times for each string. E.G. you might get 10 callbacks for "on_url"
  * each providing just a few characters more data.
  */