diff --git a/dlls/oleaut32/tests/tmarshal.c b/dlls/oleaut32/tests/tmarshal.c
index a4a2b6f0b22..2c1b8e80853 100644
--- a/dlls/oleaut32/tests/tmarshal.c
+++ b/dlls/oleaut32/tests/tmarshal.c
@@ -706,7 +706,7 @@ static HRESULT WINAPI Widget_put_prop_req_arg(
     return S_OK;
 }
 
-static HRESULT WINAPI Widget_restrict(IWidget* iface, INT *i)
+static HRESULT WINAPI Widget__restrict(IWidget* iface, INT *i)
 {
     trace("restrict\n");
     *i = DISPID_TM_RESTRICTED;
@@ -756,7 +756,7 @@ static const struct IWidgetVtbl Widget_VTable =
     Widget_ByRefUInt,
     Widget_put_prop_opt_arg,
     Widget_put_prop_req_arg,
-    Widget_restrict,
+    Widget__restrict,
     Widget_neg_restrict
 };
 
diff --git a/dlls/oleaut32/tests/tmarshal.idl b/dlls/oleaut32/tests/tmarshal.idl
index c5895744ec2..8dca84c13cf 100644
--- a/dlls/oleaut32/tests/tmarshal.idl
+++ b/dlls/oleaut32/tests/tmarshal.idl
@@ -161,7 +161,7 @@ library TestTypelib
         HRESULT prop_req_arg([in] INT req, [in] INT i);
 
         [id(DISPID_TM_RESTRICTED), restricted]
-        HRESULT restrict([out, retval] INT *i);
+        HRESULT _restrict([out, retval] INT *i);
 
         [id(DISPID_TM_NEG_RESTRICTED), restricted]
         HRESULT neg_restrict([out, retval] INT *i);