diff --git a/hypervisor/src/kvm/mod.rs b/hypervisor/src/kvm/mod.rs
index 1bf25b37b..9cf1753e0 100644
--- a/hypervisor/src/kvm/mod.rs
+++ b/hypervisor/src/kvm/mod.rs
@@ -170,6 +170,7 @@ impl vm::Vm for KvmVm {
     /// Creates/modifies a guest physical memory slot.
     ///
     fn set_user_memory_region(&self, user_memory_region: MemoryRegion) -> vm::Result<()> {
+        // Safe because guest regions are guaranteed not to overlap.
         unsafe {
             self.fd
                 .set_user_memory_region(user_memory_region)
diff --git a/vmm/src/vm.rs b/vmm/src/vm.rs
index e9cc41854..0338988e7 100644
--- a/vmm/src/vm.rs
+++ b/vmm/src/vm.rs
@@ -1459,7 +1459,6 @@ pub fn test_vm() {
             flags: 0,
         };
 
-        // Safe because the guest regions are guaranteed not to overlap.
         vm_fd.set_user_memory_region(mem_region)
     })
     .expect("Cannot configure guest memory");