diff --git a/dlls/oleaut32/tmarshal.c b/dlls/oleaut32/tmarshal.c
index a7b4009..a1355da 100644
--- a/dlls/oleaut32/tmarshal.c
+++ b/dlls/oleaut32/tmarshal.c
@@ -1371,6 +1371,7 @@ static inline BOOL is_out_elem(const ELEMDESC *elem)
     return (elem->u.paramdesc.wParamFlags & PARAMFLAG_FOUT || !elem->u.paramdesc.wParamFlags);
 }
 
+#ifdef __i386__
 static DWORD
 xCall(LPVOID retptr, int method, TMProxyImpl *tpinfo /*, args */)
 {
@@ -1542,6 +1543,7 @@ exit:
     return hres;
 }
 
+#endif /* __i386__ */
 static HRESULT WINAPI ProxyIUnknown_QueryInterface(IUnknown *iface, REFIID riid, void **ppv)
 {
     TMProxyImpl *proxy = (TMProxyImpl *)iface;