1 files changed, 6 insertions, 6 deletions
diff --git a/datetime.h b/datetime.h
index 9f85d3f2..b5dffba0 100644
--- a/datetime.h
+++ b/datetime.h
@@ -256,12 +256,12 @@ inline std::ostream& operator<<(std::ostream& out,
 
 struct interval_t
 {
-  unsigned short years;
-  unsigned short months;
-  unsigned short days;
-  unsigned short hours;
-  unsigned short minutes;
-  unsigned short seconds;
+  int years;
+  int months;
+  int days;
+  int hours;
+  int minutes;
+  int seconds;
 
   datetime_t begin;
   datetime_t end;