diff --git a/drivers/platform/x86/amd/hsmp/hsmp.c b/drivers/platform/x86/amd/hsmp/hsmp.c
index fd36c8f142c0..584fd9b1d31f 100644
--- a/drivers/platform/x86/amd/hsmp/hsmp.c
+++ b/drivers/platform/x86/amd/hsmp/hsmp.c
@@ -539,6 +539,7 @@ EXPORT_SYMBOL_NS_GPL(hsmp_misc_register, "AMD_HSMP");
 void hsmp_misc_deregister(void)
 {
 	misc_deregister(&hsmp_pdev.mdev);
+	hsmp_pdev.mdev.this_device = NULL;
 }
 EXPORT_SYMBOL_NS_GPL(hsmp_misc_deregister, "AMD_HSMP");