Index: rust-prometheus-0.13.4/src/histogram.rs
===================================================================
--- rust-prometheus-0.13.4.orig/src/histogram.rs
+++ rust-prometheus-0.13.4/src/histogram.rs
@@ -528,8 +528,8 @@ impl Instant {
             #[cfg(all(feature = "nightly", target_os = "linux"))]
             Instant::MonotonicCoarse(t) => {
                 let now = get_time_coarse();
-                let now_ms = now.0.tv_sec * MILLIS_PER_SEC + now.0.tv_nsec / NANOS_PER_MILLI;
-                let t_ms = t.0.tv_sec * MILLIS_PER_SEC + t.0.tv_nsec / NANOS_PER_MILLI;
+                let now_ms = (now.0.tv_sec as i64) * MILLIS_PER_SEC + (now.0.tv_nsec as i64) / NANOS_PER_MILLI;
+                let t_ms = (t.0.tv_sec as i64) * MILLIS_PER_SEC + (t.0.tv_nsec as i64) / NANOS_PER_MILLI;
                 let dur = now_ms - t_ms;
                 if dur >= 0 {
                     Duration::from_millis(dur as u64)
@@ -559,10 +559,8 @@ mod coarse {
     pub const MILLIS_PER_SEC: i64 = 1_000;
 
     pub fn get_time_coarse() -> Timespec {
-        let mut t = Timespec(timespec {
-            tv_sec: 0,
-            tv_nsec: 0,
-        });
+        let t : libc::timespec = unsafe { std::mem::zeroed() };
+        let mut t = Timespec(t);
         assert_eq!(
             unsafe { clock_gettime(CLOCK_MONOTONIC_COARSE, &mut t.0) },
             0