diff --git a/fuzz/fuzz_targets/uint128_fuzz.rs b/fuzz/fuzz_targets/uint128_fuzz.rs
index 9b8b2afa..6b832ade 100644
--- a/fuzz/fuzz_targets/uint128_fuzz.rs
+++ b/fuzz/fuzz_targets/uint128_fuzz.rs
@@ -40,6 +40,10 @@ fn do_test(data: &[u8]) {
     assert_eq!(128 - a_native.leading_zeros() as usize, a.bits());
     assert_eq!(a_native as u64, bitcoin::util::uint::Uint128::from_u64(a_native as u64).unwrap().low_u64());
 
+    let mut a_inc = a.clone();
+    a_inc.increment();
+    check_eq!(a_native.wrapping_add(1), a_inc);
+
     // Checks with two numbers:
     let (b_native, b) = read_ints!(16);