diff --git a/src/profiler.rs b/src/profiler.rs
index 9a27897..5293b3a 100644
--- a/src/profiler.rs
+++ b/src/profiler.rs
@@ -1230,10 +1230,9 @@ impl Profiler<'_> {
     pub fn setup_perf_events(&mut self) {
         let mut prog_fds = Vec::new();
         for i in 0..num_cpus::get() {
-            let perf_fd = unsafe {
-                setup_perf_event(i.try_into().unwrap(), self.sample_freq.try_into().unwrap())
-            }
-            .expect("setup perf event");
+            let perf_fd =
+                unsafe { setup_perf_event(i.try_into().unwrap(), self.sample_freq as u64) }
+                    .expect("setup perf event");
             prog_fds.push(perf_fd);
         }