diff --git a/libafl/src/bolts/cli.rs b/libafl/src/bolts/cli.rs
index 8b3885311b..d9855c9428 100644
--- a/libafl/src/bolts/cli.rs
+++ b/libafl/src/bolts/cli.rs
@@ -137,7 +137,7 @@ pub struct FuzzerOptions {
     /// cores. 'none' to run a client without binding to any core.
     /// ex: '1,2-4,6' selects the cores 1, 2, 3, 4, and 6.
     #[cfg(feature = "frida_cli")]
-    #[arg(long, default_value = "0", value_parser = Cores::from_cmdline, help_heading = "ASAN Options")]
+    #[arg(long, default_value = "0", value_parser = Cores::from_cmdline, help_heading = "Cores that should use ASAN")]
     pub asan_cores: Cores,
 
     /// number of fuzz iterations to perform
diff --git a/libafl/src/bolts/core_affinity.rs b/libafl/src/bolts/core_affinity.rs
index 35aff72126..4e129fc7e5 100644
--- a/libafl/src/bolts/core_affinity.rs
+++ b/libafl/src/bolts/core_affinity.rs
@@ -158,8 +158,7 @@ impl Cores {
 
     /// Checks if this [`Cores`] instance contains a given ``core_id``
     #[must_use]
-    pub fn contains(&self, core_id: usize) -> bool {
-        let core_id = CoreId::from(core_id);
+    pub fn contains(&self, core_id: CoreId) -> bool {
         self.ids.contains(&core_id)
     }
 
@@ -740,7 +739,7 @@ mod freebsd {
             // Ensure that the system pinned the current thread
             // to the specified core.
             let mut core_mask = new_cpuset();
-            unsafe { CPU_SET(ids[0].id, &mut core_mask) };
+            unsafe { CPU_SET(ids[0].0, &mut core_mask) };
 
             let new_mask = get_affinity_mask().unwrap();