diff --git a/src/timetypes.rs b/src/timetypes.rs
index 4c184a2..1adfb4e 100644
--- a/src/timetypes.rs
+++ b/src/timetypes.rs
@@ -314,6 +314,7 @@ macro_rules! impl_sub_assign {
 }
 
 impl_add!(TimeDelta, TimeDelta, TimeDelta);
+impl_add!(TimePoint, TimePoint, TimeDelta);
 impl_add!(TimePoint, TimeDelta, TimePoint);
 impl_add!(TimeDelta, TimePoint, TimePoint);