diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index ace0baf9bd..0d24eb84e1 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -46,6 +46,7 @@ redundant_explicit_links = "deny"
 [workspace.lints.clippy]
 # default-warn lints
 result_unit_err = "allow"
+manual_checked_ops = "deny"
 should_implement_trait = "deny"
 # can be for a reason, e.g. in callbacks
 unused_self = "allow"
diff --git a/rust/hw/core/src/qdev.rs b/rust/hw/core/src/qdev.rs
index 145e20a984..b2e5441079 100644
--- a/rust/hw/core/src/qdev.rs
+++ b/rust/hw/core/src/qdev.rs
@@ -425,18 +425,16 @@ impl Clock {
     }
 
     pub const fn period_from_hz(hz: u64) -> u64 {
-        if hz == 0 {
-            0
-        } else {
-            Self::PERIOD_1SEC / hz
+        match Self::PERIOD_1SEC.checked_div(hz) {
+            Some(value) => value,
+            None => 0,
         }
     }
 
     pub const fn period_to_hz(period: u64) -> u64 {
-        if period == 0 {
-            0
-        } else {
-            Self::PERIOD_1SEC / period
+        match Self::PERIOD_1SEC.checked_div(period) {
+            Some(value) => value,
+            None => 0,
         }
     }