diff --git a/src/cowboy_clock.erl b/src/cowboy_clock.erl
index 66fc009bd..3597bddad 100644
--- a/src/cowboy_clock.erl
+++ b/src/cowboy_clock.erl
@@ -38,6 +38,7 @@
 -type time() :: {hour(), minute(), second()}.
 
 -type datetime() :: {date(), time()}.
+-export_type([date/0, time/0, datetime/0]).
 
 -record(state, {
 	universaltime = undefined :: undefined | datetime(),
diff --git a/src/cowboy_cookies.erl b/src/cowboy_cookies.erl
index d7addd3ce..9c6c4c33a 100644
--- a/src/cowboy_cookies.erl
+++ b/src/cowboy_cookies.erl
@@ -23,7 +23,7 @@
 -type kv() :: {Name::binary(), Value::binary()}.
 -type kvlist() :: [kv()].
 -type cookie_option() :: {max_age, integer()}
-				| {local_time, {calendar:date(), calendar:time()}}
+				| {local_time, {cowboy_clock:date(), cowboy_clock:time()}}
 				| {domain, binary()} | {path, binary()}
 				| {secure, true | false} | {http_only, true | false}.
 -export_type([kv/0, kvlist/0, cookie_option/0]).