diff --git a/src/unix/redox/mod.rs b/src/unix/redox/mod.rs
index 68551719..afba6772 100644
--- a/src/unix/redox/mod.rs
+++ b/src/unix/redox/mod.rs
@@ -26,7 +26,7 @@ pub type ino_t = ::c_ulong;
 pub type mode_t = ::c_int;
 pub type nfds_t = ::c_ulong;
 pub type nlink_t = ::c_ulong;
-pub type off_t = ::c_long;
+pub type off_t = ::c_longlong;
 pub type pthread_t = *mut ::c_void;
 pub type pthread_attr_t = *mut ::c_void;
 pub type pthread_cond_t = *mut ::c_void;
@@ -46,7 +46,7 @@ pub type socklen_t = u32;
 pub type speed_t = u32;
 pub type suseconds_t = ::c_int;
 pub type tcflag_t = u32;
-pub type time_t = ::c_long;
+pub type time_t = ::c_longlong;
 
 #[cfg_attr(feature = "extra_traits", derive(Debug))]
 pub enum timezone {}