diff --git a/time.zig b/time.zig
index 117184666317bf5c1fc3dcd482049777ec3cb034..b2c391b058f5bd09e9884609dcab2f0510b4e806 100644
--- a/time.zig
+++ b/time.zig
@@ -165,7 +165,7 @@ pub const DateTime = struct {
         return time.isLeapYear(self.years);
     }
 
-    pub fn daysThisYear(self: Self) u64 {
+    pub fn daysThisYear(self: Self) u16 {
         return time.daysInYear(self.years);
     }