diff --git a/hypervisor/src/arch/x86/emulator/mod.rs b/hypervisor/src/arch/x86/emulator/mod.rs
index d242f796a..3bbe965ec 100644
--- a/hypervisor/src/arch/x86/emulator/mod.rs
+++ b/hypervisor/src/arch/x86/emulator/mod.rs
@@ -653,8 +653,6 @@ mod mock_vmm {
         state: Arc<Mutex<CpuState>>,
     }
 
-    unsafe impl Sync for MockVmm {}
-
     pub type MockResult = Result<(), EmulationError<Exception>>;
 
     impl MockVmm {