diff --git a/include/tlibc/time.h b/include/tlibc/time.h
index 73a3c83..a891a40 100644
--- a/include/tlibc/time.h
+++ b/include/tlibc/time.h
@@ -12,6 +12,8 @@ typedef u64 nsec_t;
 typedef u64 usec_t;
 /// miliseconds
 typedef u64 msec_t;
+/// seconds
+typedef u64 sec_t;
 
 /// system time now in nanoseconds
 ///@return u64 will overflow in 13 years