diff --git a/src/ops.rs b/src/ops.rs
index 8efd1e8..30a6f74 100644
--- a/src/ops.rs
+++ b/src/ops.rs
@@ -7,7 +7,7 @@ use super::Ratio;
 use core::ops::{Add, Div, Mul, Neg, Rem, Sub};
 
 use num_integer::Integer;
-use num_traits::{CheckedAdd, CheckedDiv, CheckedMul, CheckedSub, Inv, One, Zero};
+use num_traits::{CheckedAdd, CheckedDiv, CheckedMul, CheckedNeg, CheckedSub, Inv, One, Zero};
 
 macro_rules! forward_ref_ref_binop {
     (impl $imp:ident, $method:ident) => {
@@ -273,6 +273,17 @@ checked_arith_impl!(impl CheckedAdd, checked_add);
 // a/b - c/d = (lcm/b*a - lcm/d*c)/lcm, where lcm = lcm(b,d)
 checked_arith_impl!(impl CheckedSub, checked_sub);
 
+// -(a/b) = (-a)/b, so only the numerator can overflow
+impl<T> CheckedNeg for Ratio<T>
+where
+    T: Clone + Integer + CheckedNeg,
+{
+    #[inline]
+    fn checked_neg(&self) -> Option<Ratio<T>> {
+        Some(Ratio::new_raw(self.numer.checked_neg()?, self.denom.clone()))
+    }
+}
+
 impl<T> Neg for Ratio<T>
 where
     T: Clone + Integer + Neg<Output = T>,
diff --git a/src/tests/arith.rs b/src/tests/arith.rs
index 7bd310b..39845b0 100644
--- a/src/tests/arith.rs
+++ b/src/tests/arith.rs
@@ -2,7 +2,7 @@ use super::super::{Ratio, Rational64};
 use super::{to_big, _0, _1, _1_2, _2, _3_2, _5_2, _MAX, _MAX_M1, _MIN, _MIN_P1, _NEG1_2};
 use core::fmt::Debug;
 use num_integer::Integer;
-use num_traits::{Bounded, CheckedAdd, CheckedDiv, CheckedMul, CheckedSub, NumAssign};
+use num_traits::{Bounded, CheckedAdd, CheckedDiv, CheckedMul, CheckedNeg, CheckedSub, NumAssign};
 
 #[test]
 fn test_add() {
@@ -398,6 +398,15 @@ fn test_neg() {
     test(_1_2, _NEG1_2);
     test(-_1, _1);
 }
+
+#[test]
+fn test_checked_neg() {
+    assert_eq!(_0.checked_neg(), Some(_0));
+    assert_eq!(_1_2.checked_neg(), Some(_NEG1_2));
+    assert_eq!(_NEG1_2.checked_neg(), Some(_1_2));
+    // Negating the numerator i64::MIN overflows.
+    assert_eq!(Ratio::new(i64::MIN, 3).checked_neg(), None);
+}
 #[test]
 #[allow(clippy::eq_op)]
 fn test_zero() {