diff --git a/alioth/src/hv/kvm/vm.rs b/alioth/src/hv/kvm/vm.rs
index db99768..2cdbe92 100644
--- a/alioth/src/hv/kvm/vm.rs
+++ b/alioth/src/hv/kvm/vm.rs
@@ -146,7 +146,7 @@ impl Vm for KvmVm {
     }
 
     fn stop_vcpu<T>(_id: u32, handle: &JoinHandle<T>) -> Result<(), Error> {
-        ffi!(unsafe { libc::pthread_kill(handle.as_pthread_t(), SIGRTMIN()) })?;
+        ffi!(unsafe { libc::pthread_kill(handle.as_pthread_t() as _, SIGRTMIN()) })?;
         Ok(())
     }