diff --git a/libafl/src/bolts/core_affinity.rs b/libafl/src/bolts/core_affinity.rs
index bb66bd5b88..87837d25a9 100644
--- a/libafl/src/bolts/core_affinity.rs
+++ b/libafl/src/bolts/core_affinity.rs
@@ -688,6 +688,8 @@ mod freebsd {
 
     #[cfg(test)]
     mod tests {
+        use libc::CPU_ISSET;
+
         use super::*;
         use libc::CPU_ISSET;