diff --git a/vm/os-windows.c b/vm/os-windows.c
index 6e39422134..421d90b223 100755
--- a/vm/os-windows.c
+++ b/vm/os-windows.c
@@ -51,8 +51,7 @@ void ffi_dlopen (F_DLL *dll, bool error)
 	{
 		dll->dll = NULL;
 		if(error)
-			general_error(ERROR_FFI,F,F,
-				(void*)tag_object(get_error_message()));
+			general_error(ERROR_FFI,F,tag_object(get_error_message()),NULL);
 		else
 			return;
 	}