diff --git a/include/http.hrl b/include/http.hrl
index a4ce8ea..7701f28 100644
--- a/include/http.hrl
+++ b/include/http.hrl
@@ -20,6 +20,6 @@
 
 -type method()    :: get | post | options.
 -type multipart() :: {multipart, Boundary :: binary()}.
--type body()      :: {partial, binary()} | {multipart, [body_part()]} | binary().
+-type body()      :: {partial, binary()} | {multipart, [body_part()]} | binary() | map().
 -type body_part() :: {Field :: binary(), Data :: binary()}
                    | {Field :: binary(), Name :: binary(), Data :: binary()}.