diff --git a/lib/libkvm/kvm.h b/lib/libkvm/kvm.h
index 6b5160b6ff9..6c8fdce4c8b 100644
--- a/lib/libkvm/kvm.h
+++ b/lib/libkvm/kvm.h
@@ -69,7 +69,7 @@ struct kvm_swap {
 
 __BEGIN_DECLS
 int	  kvm_close(kvm_t *);
-int	  kvm_dpcpu_setcpu(kvm_t *, u_int);
+int	  kvm_dpcpu_setcpu(kvm_t *, unsigned int);
 char	**kvm_getargv(kvm_t *, const struct kinfo_proc *, int);
 int	  kvm_getcptime(kvm_t *, long *);
 char	**kvm_getenvv(kvm_t *, const struct kinfo_proc *, int);