diff --git a/src/naive/datetime/serde.rs b/src/naive/datetime/serde.rs
index f23805e0f3..08b7d021ab 100644
--- a/src/naive/datetime/serde.rs
+++ b/src/naive/datetime/serde.rs
@@ -223,7 +223,9 @@ assert_eq!(my_s.time, time);
     expecting: "a unix timestamp",
     visit_i64(i64): |value: i64| NaiveDateTime::from_timestamp_opt(value, 0)
         .ok_or_else(|| E::custom(ne_timestamp(value))),
-    visit_u64(u64): |value: u64| NaiveDateTime::from_timestamp_opt(value as i64, 0)
+    visit_u64(u64): |value: u64| i64::try_from(value)
+        .ok()
+        .and_then(|v| NaiveDateTime::from_timestamp_opt(v, 0))
         .ok_or_else(|| E::custom(ne_timestamp(value))),
 }